How to unlock a disabled iPad if you forgot the password, and restore it

If you forgot the passcode to your iPad, or the device has been disabled, you can restore and unlock it with a computer or ...

How to change or reset your iPad's passcode, even if you don't remember what the passcode is

To reset or change your iPad's passcode, you can use the "Passcode" menu in your Settings app, or reset the entire device.