my ipadair is disabeled ... how to enable.. it i not to itunes

It needs to be connected to a computer's iTunes in order to reset it : If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

If your computer's iTunes isn't recognising it when you connect it (iOS 10 requires iTunes 12.5.1 on a computer), try : If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

Which part isn't working ? If your computer's iTunes isn't recognising the iPad when you connect it then what OS do you have on the computer, what version of iTunes is it (iTunes > About iTunes if it's a Mac ; Help > About iTunes if a PC), and what iOS version is on the iPad