Q's-Wiping/Reinstalling iMac G5 PPC (10.4.11) for donation

Question

My parents recently purchased a new 2012, 21.5” Intel Core i, iMac with OS 10.8 installed. 
They wish to donate their old iMac G5 ALS PowerPC (20”) computer to a local charity. It came with OS 10.4 installed and they never upgraded, but did install all Tiger updates to 10.4.11.
Before donation, I want to wipe the hard drive, and then do a clean install of OS 10.4, iWork ’06 and MacFonts2, from their original discs.
Additional information:
              > The original RAM (512k) was replaced by 2 - 1 GB cards in Dec ’11.
                > The OS X discs are as follows:
                      Disc 1 = Mac OS X Install Disc 1              Disc 2 = Mac OS X Install Disc 2
                                   Mac OS ver. 10.4                                     Disc ver. 1.0
                                   AHT ver. 2.5.1                                          2Z691-5493-A
                                   Disc ver. 1.0                                             Includes Mac OS 9.2
           2Z691-5317-A                            
Because Apple no longer supports the PowerPCs AND Tiger OS 10.4, the only way I could transfer my parents’ files and maintain their original dates, etc. is by plugging a Fire-Wire 9-6 Pin Cable cord into the iMac G5 PPC, and to a Thunderbolt to Fire-Wire adapter, which in turn, was plugged into my 2012 Mac Mini (OS 10.8).  Then by putting the PPC iMac in Target disc mode, I could copy over (almost) all files.
Unfortunately, figuring this all out took a long time, because my background has been in PC’s since 1984.  I briefly owned an iMac Pro in 2006 before it was stolen from my car. Unfortunately I could not afford to replace it due to a high deductible on my Homeowner’s Policy. 
When my parents purchased their new iMac, I decided to get a Mac Mini, to help them adjust to the jump from Tiger to Mountain Lion, etc.
Here are my concerns:
1.  I was able to copy most of the old folders on the PPC iMac to a “holding” folder on the desktop of my Mac Mini. 
     Then I compared the “Get Info” of the Source file/folder to the Target disc’s file/folder “Get Info”.  Most folders copied over with no differences noted.
Should I be concerned about those files that would not duplicate?
How / where can I find out which files are okay, if they aren’t completely duplicated?
          (since I will need some application/system files from the copied files).
                              Examples of these are:
System / Library / Frameworks / JavaVM.framework
System / Library / PrivateFrameworks / Install.Framework / Versions
System / Library                          Size                            Files
             Source folder                1,893,633,028                     36,066
             Target folder                  1,514,639,237            26,653
          Difference                     378,993,791              9,413
      Missing                                                 378,671,851                        9,358  Frameworks / JavaVM.framework
      Missing                                    321,940                   55  PrivateFrameworks/Install.Framework/Versions
                                                                       0                            0          
2.  How can I install all the Tiger updates from 10.2 thru 10.11, if I cannot do a clean download straight from Apple.com?
> If I am to copy the updates from the Target disc files that I copied to my Mac Mini, will they be recognized as legal copies? 
> If so, how do I identify the correct update files to target? (i.e., are they hidden?). 
> How do I find them in the system folders?
3.  I don’t want to wipe the hard drive until I know I’ve got the stuff I need to properly reinstall the OS to 10.4.11, afterwards. 
Somewhere I read that I might need to use a stand-alone installer so I can target specific files in specific areas.
Can anyone make sense out of all this information? 
It is probably very telling that I have a PC background with the kind of questions posed above. 
I have Googled many issues and have called AppleCare on my parents behalf to get to this point.  I think I am close to being able to wipe the iMac G5, but need some answers and MORE importantly, some MORAL SUPPORT!
Note: my parents will be 80 years old this year, and the new Mac is their 3rd Mac since 1999. 
They recently learned how to use a first generation iPad that was given to them.  A couple about to celebrate 60 years together and never afraid to learn something new!
Sorry about the length of this query. I will be on and off the ‘net during the next couple of days, but I will get back to any queries for clarification ASAP. 
When I’m not working on one of my computers, I volunteer at a local library. THANKS!

Answer 1

I was so happy returning home to find the reformat phase complete. Now... not so much.
I am stuck at two different points and don't know at which I SHOULD be, and if once there, what to do in order to get the iMac to copy
     OS X 10.4 Disc 1 onto the harddrive. 
     Note: Research indicates that OS X must be present on the harddrive first/before the accompanying software can be installed from Disc 2.
Method #1:
> Inserted Install Disc 1 into the optical drive (built-in side of monitor in a G5 PPC).
> Pushed power button (Held down no keys).
> Language choice screen appears first.  Default is English, so I click 'enter.'
> Window titled "Install Mac OS X" appears.  It also contains the wording "Welcome to the Mac OS X Installer."
          I click "Continue" tab at bottom right of this window.
> At "Software License Agreement" window, click "Continue" tab at bottom right.
> Pop-down screen prompts me to AGREE to terms in order to continue installation.
> "Select a Destination" window shows the harddrive icon to the iMac with a red circle/white exclamation point on it.
> I click on "harddrive" icon (no explanation for red circle was given at this window).
> Message shows up on the Select Destination window indicating Mac OS X cannot be installed on this volume AND
          Mac OS X cannot start up from this volume. 
     >> I can either Go Back, quit Installer by clicking on the Startup Disk button, or click Restart. 
OR
     >> Use options on the Apple Menu bar at top of monitor screen to do the same.  Under Installer, I can select "Quit Installer,"
                    or chose "Startup Disk" from the Utilities dropdown.
     * Restart is self-explanatory.
     * Startup Disk brings a new window titled "Choose Startup Disk."  There are two icon options to select from. 
          1. Disk titled "OS X 10.4 Disc 1." - it's title is highlighted in blue, indicating this has been selected automatically.
          2. Network Startup (but icon has question mark on it).
          Only a "Restart" button is available here. After clicking this button, a popdown asks if I am sure I want to restart the computer
                    using the OS X Disk to boot. i.e., Cancel or Restart.
Method #2:  (Note: research indicated these are the correct icons/options I should see for PowerPC computers.
> Inserted Install Disc 1 into the optical drive.
> Hold the "option"/("alt") key down while pushing the power button on.  Hold key until 4 items show up on screen.
> The four items are:
          1.  Refresh Icon button
          2.  Square with Disk Icon and "X" on it - titled "Mac OS X Install Disc 1"
          3.  Square with Disk Icon and tiny monitor on it - titled "Apple Hardware Test"
          4.  Right Arrow Icon button
> Research indicated that the two options here are:
     >> Click the Disk Icon w/ Monitor, followed by the Right Arrow Icon button. (This is to check for possible hardware or software problems).
OR
     >> Click the Disk Icon w/"X", followed by the Refresh Icon button.
When I do the second step (X & R), it results in the same results as Method #1.
Q: What special chant must I say to make the installation disk install onto the iMac's harddrive?
          Note: I did both a Utility Disk Verify on the harddrive AND the Apple Hardware Test (long version), with no problems noted at all!
Q. I found an archived Q&A on the Tiger 10.4.11 forum that made reference to downloadable instructions for reformatting and reinstalling Tiger.
     But, like several other archived Q&A's, when I clicked on the link, it took me back to Apple's main Support page. 
     I'm guessing because Apple no longer supports Tiger, that all links relating to Tiger are severed.  Are these Archived pages only available to forum      participants whom have achieved high Levels?  The Mac OS X 10.4.11 Combo Update for PPCs link appears to have the very information I looked for      ad nauseum during Jan/Feb/Mar of this year, and never found!
          Niel (Level 10)  Feb 4, 2007 @ 2:34 am    (Link is titled "this article" and appears in the 2nd entry of this discussion thread)
                         https://discussions.apple.com/message/4015863#4015863
Thank you once again BDAqua for your timely answer and suggestions.  When I read your reply, the 3-pass was almost 1/3 complete, so I decided to hang in there and wait.  I did do another repair on the harddrive afterwards, and it appears to be fine.   our explanation of the use of solved and helpful feedback was appreciated too.  I dont' want to use them up too soon, and it appears the options stay open until someone selects one.
Also rccharles I appreciate your suggested software packages that could help with the duplication of the entire harddrive. I did use the Target Disk Made, through Firewire to Thunderbolt with my Mac Mini and most of the folders copied over 100% problem free the first time, but there always seem to be stragglers out there!
Will tackle this all again in the a.m.