My grandson gave me a apple 20GB U2 IPO...

You will first need to download itunes from the apple website at www.apple.com/itunes once installed open itunes and then connect your ipod to the computer. Through itunes you will now be able to put your music on your computer and then transfer it to your ipod.

At the apple website you will also be able to download a manual for your ipod see http://support.apple.com/manuals/#ipod

Hope this helps.