How do I get iTunes on my iPad?

If you can't find the iTunes store app on any of your iPad's homescreens or app folders, and you can't find it via the spotlight search screen (swipe your first home screen to the right), then is it hidden by Settings > General > Restrictions > iTunes being set 'off' ?

If not then have you tried a reset to see if you can find it after the iPad has restarted ? Press and hold both the sleep and home buttons for about 10 to 15 seconds (ignore the red slider), after which the Apple logo should appear - you won't lose any content, it's the iPad equivalent of a reboot.

Or do you mean your music ? Music that you download directly on the iPad via the iTune store app, and music that you synced from your computer, should be in the Music app

Syncing music : http://support.apple.com/kb/HT1351