Q: moving all music off of my ipad

Google iTunes Match.  You need to purchase a year's membership ... etc.  Just google it for details.

Music is not part of the free 5GB associated with iCloud.

iTunes music is restored as part of an iCloud backup restore.

Also, iTunes music can be retreived from purchase history inside the iTunes app on your iOS device.

For more info on what is part of iCloud check out: http://support.apple.com/kb/HT4859

iTunes match is a great solution if you have a lot of non-iTunes music on your device.

For more info on that, check out: http://support.apple.com/kb/HT4914