iPad Mini Not Restoring?
Restoring it from iTunes should have worked. But this only works if you have previously synced your device with iTunes and have a backup stored on your computer.

If you know the right password... do following.

Try to back up the iOS device in iTunes

The first thing you should try to unlock your disabled device is a simple iTunes backup. 

Connect your iOS device to your computer via USB and open iTunes. Select the device in the upper right-hand corner to display its properties in the main screen.



iTunes backup

Click on the "Back Up Now" button to start a sync. 

You may be prompted to type in your password on your iOS device to start the sync because the device is locked. 

Once you have typed in your password, you can cancel the back up and start using your device.