Note: Gmail has hidden the phone number, so it is not possible to change the password and recover mail in the usual way.
Instructions on how to change password and recovery email:
1. Login Gmail
2. Run the link: https://myaccount.google.com/signinoptions/rescuephone?hl=en and copy theToken
Link to change recovery email: https://myaccount.google.com/recovery/email?rapt= + Token
Note: Prestigious warranty, refund within 3 days from the date of purchase (successful login, no warranty), I never change the password of the mails sold, but because this is old Gmail, I recommend Please change your password after purchasing.