You've got a new computer. All your music and videos are on your iPod and you'd like to populate you new iTunes library from it. Unfortunately iTunes doesn't let you transfer anything other than your iTunes store purchases from your iPod.
To transfer all your iPod content, all your music, playlists, videos, podcasts and photos to your new iTunes library you will need to download software like
TouchCopy.
Here is how to use TouchCopy
1. Download and Install TouchCopy from
http://www.touchcopy.com. Downloads are free and are available for both PC and Mac.
2. Start up TouchCopy by double-clicking the TouchCopy icon on your desktop.
3. Connect your iPod or iPhone to your computer. TouchCopy may start iTunes - don't worry, TouchCopy has fixed it so that iTunes will not sync music or video with your iPod while TouchCopy is running. These changes are restored when you quit TouchCopy.
4. Select which songs you want to copy into iTunes, if you want to select all your music, select "Music" from the list on the left and click on "Copy to iTunes" button in the TouchCopy control bar.
In a similar way, you can also use TouchCopy to copy your playlists, videos, podcasts, photos, contacts, calendars, notes and iPhone SMS.
When you are satisfied that all your iPod content is safely in iTunes, use iTunes to re-sync your iPod which will enable you to add new content to it.
Here's a YouTube video that guides you through how to use TouchCopy