I don't think you can transfer from the iPod to a PC. You can however copy the files on the PC onto a memory stick into the relevant folder on your new laptop. You can then get itunes to add them to the library on the new laptop. However when you sync it up with the new laptop it will break the sync with the PC and delete all the tunes on the iPod replacing them with the ones on the laptop.
On a slightly related note bad syncs can seriously cock up your iPhone. Had all my tunes reclassified as other and then couldn't access them. Ended up having to download a piece of software so I could see the hidden directories on the iPhone and delete them manually. Not an uncommon problem judging from the number of hits I got when I Googled the problem.