Currently Being ModeratedJan 21, 2013 12:11 PM (in response to donzy10)
To move music (other than purchased) from an iDevice to a computer you need a third-party transfer application like Senuti. If the Music is all purchased you can do this with iTunes.
Currently Being ModeratedJan 21, 2013 12:13 PM (in response to donzy10)
You should be able to copy iTunes purchases over via File > Transfer Purchases (File > Devices > Transfer Purchases on iTunes 11). For music from other sources you can either copy it over from your old computer (copying music) or from your backup. If you don't have your music anywhere then you will need a third-party program that can copy it off your iPad - there are some listed half-way down this page.