I need help with my operating system

Okay, little bit of background:
I bought the iMac second hand from a family friend who we no longer have contact with, the operating system etc was already installed.
The disk drive on the mac is broke (I dont have the disks anyway, so it would be no use)
I never purchased the operating system, like I said, it was pre-loaded.
A few programmes weren't running correctly and the computer was just generally running slowly, so I decided to just restore the system as there was no important data on it and it would run faster in the end, and I figured the programmes would run properly again once restored.
Anyway, I unknowingly deleted the operating system in the process of the restore (I thought it would only delete personal data like it does on my windows PC)
I have no restore disk (a broken disk drive anyway), my apple ID was not used to buy the operating system, so therefore it cant be used to restore the operating system, I also never backed up the harddrive externally so it cant be reinstalled from that.
My problem: I have no operating system and no way of recovering it. I read about Mavericks and because its free, I decided to try and download it, but with no operating system, the mac can only run 'Safari' and wont save things I try to download to the harddrive (it just says theres no space and the download doesnt happen). I also tried to access the App Store from Safari to try to download OS X lion on my apple ID, but once again, when using Safari on a mac without an operating system, it is very restrictive and I cant access the download page.
I have no idea what to do and live miles away from the nearest apple store.
Thanks in advance for any help provided by anyone.
Jordan.
Additional information:
Its a 2007 iMac which was running OS X Lion 10.7.4 (I think, it was definitely Lion though).
Serial No. is W8*******X85
<Edited by Host>

Ah. Well, then you have an itty-bitty problem. You need to backup your files to start with. You will need your retail Snow Leopard installer DVD which your friend should have provided to you. If he did not then ask him to bring it to you. It belongs to you along with the original distribution discs that came with computer when it was new.
Do the following once you have the Snow Leopard DVD:
Clean Install of Snow Leopard
Be sure to make a backup first because the following procedure will erase
the drive and everything on it.
     1. Boot the computer using the Snow Leopard Installer Disc or the Disc 1 that came
         with your computer. Insert the disc into the optical drive and restart the computer.
         After the chime press and hold down the "C" key. Release the key when you see
         a small spinning gear appear below the dark gray Apple logo.
     2. After the installer loads select your language and click on the Continue
         button. When the menu bar appears select Disk Utility from the Utilities menu.
         After DU loads select the hard drive entry from the left side list (mfgr.'s ID and drive
         size.) Click on the Partition tab in the DU main window. Set the number of
         partitions to one (1) from the Partitions drop down menu, click on Options button
         and select GUID, click on OK, then set the format type to MacOS Extended
         (Journaled, if supported), then click on the Apply button.
     3. When the formatting has completed quit DU and return to the installer. Proceed
         with the OS X installation and follow the directions included with the installer.
     4. When the installation has completed your computer will Restart into the Setup
         Assistant. Be sure you configure your initial admin account with the exact same
         username and password that you used on your old drive. After you finish Setup
         Assistant will complete the installation after which you will be running a fresh
         install of OS X. You can now begin the update process by opening Software
         Update and installing all recommended updates to bring your installation current.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Upgrading to Lion
You can purchase Lion at the Online Apple Store. The cost is $19.99 (as it was before) plus tax. It's a download. You will get an email containing a redemption code that you then use at the Mac App Store to download Lion. Save a copy of that installer to your Downloads folder because the installer deletes itself at the end of the installation.
     Lion System Requirements
       1. Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7,
           or Xeon processor
       2. 2GB of memory
       3. OS X v10.6.6 or later (v10.6.8 recommended)
       4. 7GB of available space
       5. Some features require an Apple ID; terms apply.
After you sign into your App Store account with your Apple ID click on the Redeem option under Quick Links to download your copy of Lion.
As an aside to this: All actual 2007 iMacs are able to run Mavericks. So rather than buying Lion you may prefer to upgrade to Mavericks which is Free.

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Message was edited by: Texas Mac Man

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<[email protected]> wrote:
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Hello there
I need help
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~Work like you don't need the money~
~Love like you've never been hurt~
~Dance like nobody is looking~

sjafri wrote:
the problem is that my carrier said that, if I using non official OS from them, my warranty will be void, that's why I asked where my vendor link, and I hope I can get answer at this forum.
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Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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Hi All,
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Thanks

Hi,
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Message was edited by: Shiwen
Message was edited by: Shiwen

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tt2

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