Need Urgent Help Cannot install Mac OSX 10.6 on 20" intel imac

I recently purchased an intel imac an intel mac pro from an auction. When i purchased the macs i was told that no operating systems will installed and i would need to purchase and install mac osx10.
I purchased the mac osx10.4.6 family pack from the apple store online.
i put the new disc in the mac and restarted holding down c.
for some reason nothing happens and i get folder with a question mark.
I have tried this several times but nothing seems to work.
I am a complete novice with macs and migrsting from pc.
thanks

You cannot buy a retail version of Tiger that will install on any Intel Macs. You must have the original installer discs that came with the computer. You should not have purchased the computers without them nor should they have been sold to you without them.
The only option you have is to call AppleCare or go to a local Apple store and see if you can purchase the discs needed for each computer (there are different versions for each model.)
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