Not to be rude but this is definitely the wrong place to ask these questions. This is not an apple support forum.
That being said it sound like you are having trouble getting access to the administrator account on your Apple. Please be aware that this is not a hardware issue but its merely a software issue. Software can always
Here is one guide:
http://theappleblog.com/2008/06/22/rese ... n-os-x-cd/
In the future do yourself a favor and use google.
All things considered though it sounds like you do not understand what you are doing - in which case go visit your local geek friend and have him walk you through something like this. Otherwise you will be left with a mac that doesnt work at all.