I changes my computer so the itunes that are on my iPod are not on a computer but I don't want to erase all of them and start over, how do I get the itunes on my iPod right now to a new computer?

Look into this software: Cucusoft iPod to Computer, iPod/iTouch/iPhone to Computer Transfer, free download It is one of many products out there do this. It isn't really free. The free download allows you to return one song at a time. You have to buy the version that allows you to return your entire library at once.

You might notice that even the advertisement displayed on your question pitches myPod Apps - iPod & iPhone Transfer Software