Is it possible to restore songs from an iPod to iTunes?
There is no end to the people that will offer to sell you some software to do this.

Here is a long list:
https://discussions.apple.com/docs/DOC-3991

There should be several free ways to do this including this one:
http://download.cnet.com/PhoneTrans/3000-18553_4-75736709.html

Many advertising free downloads but are crippled and will only allow a few songs at a time.

I don't use windows so I cannot recommend one or the other but I would not pay for something you can find for free if you just look a little bit.

Good Luck