Q: мне подарили ipad с ID и забытым парлем и не существующим адресом

If you can't reset its password via http://iforgot.apple.com

try contacting Support to get it reset : Contact Apple for help with Apple ID account security - Apple Support

Or, and if you were the original purchaser of the iPad (i.e. it wasn’t bought used), you could try going to an Apple Store (make a Genius Bar appointment if you do) or try contacting iTunes Support online (https://www.apple.com/emea/support/itunes/contact.html) and see if they can remove the iPad from the account - they are likely to want to see proof of ownership before they might help e.g. original receipt with the serial number on it

можно по этой инструкции сделать, но планшет будет сброшен.

<Link Edited by Host>

Recovery mode does not remove activation lock

Try remembering the account's password, or getting the account's password reset by contacting Support.

Without proof of purchase Apple won't be able to help with removing activation lock.