My old laptop's hard drive crashed so I bought a new one. I just downloaded iTunes on my new laptop. How can I put all my music, podcasts, apps, etc., on the new computer without the old one?
iTunes: How to move your music to a new computer
This user tip should be helpful too. It refers to the iPhone, but it's equally valid for iPods as well…
Syncing to a "New" Computer or replacing a "crashed" Hard Drive
Here is another one
Recovering your iTunes library from your iPod or iOS device: Apple Support Communities
Retrieving data ...