Antitheft alarm system will not shut off. on 1991 Lincoln Mark VII

New igniton lock cylinder with keys. As soon as car is turned over the alarm goes off. Used old key in door to disarm and it doesnt work. New keys are not keyed for the lock in the door.

Asked by for the 1991 Lincoln Mark VII
needs to be programmed from ford. you cannot progam the system.

Thank you so much. Do you have any idea what the cost is for that?