You can transfer music from your ipod to your itunes. Make sure your ipod is not on autosync. Plug your ipod into your computer. Go to my computer and find which drive you've plugged it into. It should show up as whatever you've named you're ipod click on it to open it up you should see the four following folders; Calendars, Contacts, iPod_Control, and Notes. Open the Ipod_Control folder and you'll see five more folders - Accessories, Artwork, Device, iTunes, and Music. Open the music folder and you'll see several folders depending on how much music you have they will be labeled F00, F01, F02 and so on. Open these folders one at a time and you will see 100+ files, some will have artist and album names and some will just be labeled with four capital letters, these are all music files and as long as you put them on your iPod by legal means Itunes will recognize them and give them proper names during the transfer. So what you do is clickdrag all the way down so they're all highlighed then with your iTunes library open click/hold and drag them and just drop them into your library, then go back open up the next F01 folder and repeat until you have done this with all the F folders. An important note to remember. You can do this with your iPod and only your iPod, doing it with anyone elses device is piracy, illegal and just plain wrong. If you think you won't get caught think again. All of these devices have serial numbers and/or ip adresses. Apple has the ability to check your library, so use this information responsibly.
