If you can remember your Apple ID and password, you can go to icloud official website and erase your device. Or you need to go to third-party unlocker official site such as joyoshare ipasscode unlocker to download and install the software and use it to remove the locked screen.

If your ipad is disabled connect to itunes, you can try to use icloud to erase the device. But if you cannot remember your Apple ID and password, you may need to turn to the third-party software such as joyoshare ipasscode unlocker to remove passcode from ipad.

If you do not unlock Siri, you can try to use Siri to remove the locked screen without erasing data. Or you need to use itunes or icloud to unlock it if you have synced the device to a computer recently or remember your Apple ID and password. But if you cannot remember Apple ID passcode, the only thing you can do is turning to third-party software such as joyoshare ipasscode unlocker to unlock iphone passcode.

Based on your experience, iTunes will unable to help you unlock your ipad. Maybe you can try to use icloud to remove the locked screen if you can remember your Apple ID and have turned Find My iPad on. If not, you may need to use the third-party software such as joyoshare ipasscode unlocker to remove ipad passcode.

As you say, you have no access to get the device passcode, let alone Apple ID and password. So iTunes and iCloud both do not work for you. If your ipad is running ios 8 to ios 10.1, maybe you can try to unlock it with Siri, but this method is complex and not always successful. The fastest way to solve the problem is turning to the third-party software, I used an ipad unlocker named joyoshare ipasscode unlocker and you can have a try.

If you do not have itunes account, you will unable to unlock your ipod touch via itunes. Maybe you can try to turn to the third-party unlocker. I used an ipod unlocker named joyoshare ipasscode unlocker to solve such problem. Hope it can help you too.

You don’t have Apple ID and password, so it is impossible for you to unlock it with icloud. If you have synced your device to a computer in recent times, you can try to restore the device via itunes. If not, you can only turn to the third-party software. For myself, I used a windows unlocker called joyoshare ipasscode unlocker to remove the locked screen and it succeeded. Maybe you can have a try.