You crack me up. Sorry you got took. I've been "taken" a few times myself. It's actually why I got so involved with repairing machines. You believe people that it 'works' and then have to learn how to repair it or lose all your money!
You can get a foot control for it from SewClassic. Shoot Jenny an e-mail and she can tell you which one to order. You'll have to clean it and order some Triflow from Jenny. Don't use it on the motor, but open it up and oil the metal parts that move. You may need a new belt too.