I am stumped. Is there any music in the music app?
Try this now. Quit the Music app, restart the iPad and then launch the Music app again.
Go to the home screen first by tapping the home button. Double tap the home button and the task bar will appear with all of your recent/open apps displayed at the bottom. Tap and hold down on the Music app icon until it begins to wiggle. Tap the minus ➖ sign in the upper left corner to close the app. Restart the iPad.
Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
After the iPad restarts - tap the Music app icon and see if the songs appear.