HT201250 I am very frustrated. New to iMac products. Just bought a 27" iMac two days ago. Received no manual, no booklet with ID registration number, etc. Need help migrating PC to iMac. How do I get in touch?

Question

Need help migrating pc to imac. Do not have manual. Trying to get infornation online, but, cannot get an answer.
I have downloaded pc migration assistant to pc windows 8 pro. Was able to get imac to finally give me "the number"
Did the same with pc received number once, not same as imac. Pop up window with info dissappers and cannot recover
What am I doing wrong? Paid extra for extended support package and it took hours to finally get it registered and approved.
However, no help. Yikes, I feel like a make another great mistake!

Answer 1

First: If you purchased AppleCare you should call back at 1-800-APL-CARE and ask for further assistance.  You'll want to learn how to retrieve your operating system version and your IMac's serial number as you'll need these for when you call AppleCare:
Click on the Black Apple in the top left hand corner of your Imac's physical monitor
Click on About this Mac from the drop down menu
Below the silver Apple and "OS X" it will say "Version 10.x.x"  (If this number is not 10.8.4, run Software Update by hitting the button marked "Software Update")
Click on this number twice in a row.  This is your machine's serial number.  (zeros can be used; the letter "O" is never used).
http://support.apple.com/kb/HT1349 for details how to find serial numbers on Apple products
If you have an Apple ID (you can create one at appleid.apple.com), you can login to supportprofile.apple.com, register an Apple product, and sign up for VoicePass, which, if you give your product a name e.g. Maria's Imac, you can speak that over the phone and skip having to give the serial number when you call. 
If you have an Apple ID, you can also call AppleCare and ask them to activate VoicePass.
This is the link for your tech specs: http://support.apple.com/kb/SP667
This is the link for your quick start guide: http://manuals.info.apple.com/en_US/imac_late2012_quickstart.pdf
This is the link for important product information: http://manuals.info.apple.com/en_US/imac_late2012_quickstart.pdf
Second: this is an educated guess: Your new Imac and your PC need to be either on the same wifi network or you need to connect them physically with an Ethernet cable (available at Radio Shack, Wal Mart, etc).  My guess is that they are not, and so your IMac and PC are not talking to each other.  That might be why you are seeing a different code on the PC.
Time Machine would not be relevant to your issue.  http://support.apple.com/kb/HT4796 is the link to relevant instructions, however it left out some housekeeping you should do on your Imac before you begin a migration
Run Software Update on the IMac to confirm that the latest updates are installed.
On the IMac, make sure that you have the latest versions of any third-party software.
On the source Mac, open System Preferences, click Sharing, and make sure there is a name in the Computer Name field.
Do not let either computer go to sleep while you are attempting to migrate. To disable sleep on the IMac
Choose System Preferences from the Apple () menu.
Choose Energy Saver from the View menu.
Adjust the "Computer sleep:" slider to Never. (Change this back after the migration is done).
You can adjust "Display Sleep" to a few minutes - this won't affect the migration
Uncheck the box if checked next to "Put Hard Disks to sleep when possible"
I don't know Windows 8 but this link looks promising as to how to disable sleep: http://techmell.net/how-to/disable-enable-sleep-mode-hibernate-windows-8/
Once you've done this, either connect both Mac and PC to the same wifi network and surf the web with each to confirm that connection is working - or connect them to each other with an Ethernet cable. 
Then relaunch Migration Assistant on your Imac and your PC, and follow the instructions in http://support.apple.com/kb/HT4796 starting with your IMac, or call AppleCare back. 
Understand that if you have further issues, you'll need to help AppleCare help you by:
walking them through the steps you've taken in Migration Assistant
letting them guide you as they isolate the issue to either:
The Imac's software
The IMac's hardware
The PC's software
The PC's hardware
Firewall settings (maybe - especially if 3rd party firewalls are installed)
The wifi connection, if used
The ethernet connection, if used
I think the issue is likely what I guessed, or it's a software issue.
To learn more about your new Mac, I recommend this link: http://www.apple.com/support/imac/intel/
And this book: http://www.amazon.com/books/dp/0789749890
I am a technical support professional who troubleshoots Macs all day long.  I do this for a living.  The book above is the most accurate, and easy to understand book I've seen with respect to using Mountain Lion and its various applications.  It's for a MacBook but the focus is on the software which is why I recommend it.
Don't feel like you have to rush to upgrade to OS X Mavericks.  In fact, you should always confirm both all the hardware and software you use is compatible with any new operating system before you upgrade.  And ask yourself: "why do I need it now?"  Because it's new is not a good answer.
In the future, specifying any troubleshooting others have done will help those on these boards help you.  Also, don't let a specific issue lead you to assume you've made an all-encompassing mistake.  It's just one issue, and it's resolvable.
And everyone else: giving a dozen recommendations for reading will only leave the petitioner bewildered.  Start with three.  And try responding with a hypothesis as to what's causing the primary problem!