iTunes question - can I reload from my iPod to my laptop?

I recently loaded Windows 7 onto my laptop (was Windows XP Prof) but in doing so didn't save i-tunes which has now completely disappeared from my laptop. Is there an "easy" way to copy/reload from i-pod onto my laptop? Tks.
 
Don't you just plug in your ipod and wait for it to sync?
Shouldn't be a problem if you have everything on your ipod.
Else, it does become problematic, but maybe not impossible.
 
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