iPod Lost all my music.

My e-mac recently broke down and i lost everything on my hard drive inclusding all my tunes in itunes. I have a mini iPod with all th emusic too. I also just recently purchased a new Imac . Can I soemwho load all my music from my mini ipod on itunes on my new Imac. If I can, how is this done? Appreciate all the help. Thanks