If all the music was bought on the same iTunes account or added from other sources through the iTunes program, this should work.
In iTunes under the File menu you should find Transfer Music from my iPod (or something similar). Once your music is on the MacBook Pro, you will be able to sync it with your iPad.
You will also be able to go ahead and let iTunes wipe the iPod and sync new stuff. Be careful and check to make sure your music really did end up on the computer before doing this. Also be sure there are no photos or other content on the iPod that you don't have saved somewhere else and don't care to lose.
The first thing I recommend you do is open iTunes, with no device plugged in, go to Preferences, Devices, and check the Prevent iPods, iPhones, iPads from automatically syncing. This will prevent any changes from taking place until you are ready.