Welcome to the MacNN Forums.

I bought a macbook from someone but they didn't give me the disk or anything that came with it, I want to take off everything they put on here, I upgrade to leopard, but it didn't let me delete what he put on here. Is there anyway for me to delete what he put on here and restore the macbook back to the day he bought it...since leopard didn't give me that option...

Instead of the upgrade, you should have chosen clean install. There's a button you click, I think called Options, during one of the early installation windows.

You can easily redo the install. Just boot from the Leopard disc and be sure to choose Clean from Options.

By me booting up from my leopard, by doing this what all will it do to my computer???

You have to boot from the Leopard DVD in order to do the clean install.

The process will erase everything once you've completed the clean install, like you wrote you'd wanted to do originally.

after I do this will I need the install disk that came with the computer to finish anything, or rebooting up from the leopard disk it will do everything for me, and it want mess up my macbook.. also how do i save everything that i have on my computer that i put on there....sorry i seen a macbook for sale bought it, don't have no manuals or anything so sorry if i sound stupid

Reinstalling from the Leopard DVD should make everything work just fine. It's not like a PC where custom hardware needs special drivers that you have to hunt down. You can also get all the manuals you could want online from Apple. For free.

But first things first. Put the Leopard DVD in, wait for it to show up on the desktop, and then choose restart from the Apple () menu. When you hear the chime, hold down the "C" key to make it boot from the DVD drive. Once it does, you'll be in the installer. One of the options you'll get is labeled "Erase and Install." That's the one you want.

Read Apple's documentation about installing Leopard here for more information.

This should be a painless process, though it may take a little time. As long as you back up your documents and applications (read how to do that here), then this process will make the computer YOURS without anyone else's stuff on it.

It's best if you also know that there will probably be some applications that will be erased and that only the Apple appications will be reinstalled from the Leopard install disk. For example, if MS Office or Photoshop are on the laptop, they'll be gone.

If you want to keep these applications, you'll be better off establishing a new admin user, then just always logging in as that user. Alternatively, you could perhaps using the freeware called ChangeShortName, which would allow you to change the original user's short name to whatever you're more comfortable with, changing the password, etc, along with deleting the original user's data and docs.

Your choice.