My Apple TV box won't accept my Appleid

Ive got an old TV box model no 1378, And I've tried resetting & restoring the box. I've changed my existing password to a shorter neater one as the remote control is very 'clunky' and easy to make mistakes on a long password.

The best I've got is, after entering the new password (that works on my other devices) I got a txt from Apple telling me to repeat the process but put this 6 digit sequence after the password. I did this but got an error message saying "Unable to sign in as your Apple account isn't set up for Photo Stream" Can any one help please?