Apple ID
the Apple ID on the iPad mini is not mine so it will not let me reset the iPad, it also won't let me change the Apple ID and says it is disabled
iPad mini 2 Wi-Fi
Question marked as
If this is a used device, you will need to contact the previous owner to have them log out of iCloud or go to iCloud.com/Find My Phone and erase the device, then remove it from their account. If you can’t do that, the device is useless.
Activation Lock - Turn off Find My iPhone
If necessary, if you are the original owner, take the device, the original purchase receipt with the serial number, and a photo ID to the nearest Apple Store.
or contact Apple ID Support. They will need to see the original purchase receipt/paperwork also.
Apple Support by e-mail or chat
Or fill out and submit this form.