How do i force restart if my homebutton is broken

I'm afraid there's nothing you can do to force reset an iPad without it's home button. Wait for the battery to die out so that way the iPad restarts.

You don't. You need the physical home button in order to force restart.

You don't. You can wait until the battery runs out and plug the device in. It will restart once it gets enough charge on it. But, really, you need to get it fixed.