The Toyota promotion was in the fall of 1979. It was as the Toyota Supra was first coming out. They gave away four Corollas, a Supra and the front half of an old Celica. The Celica's radio worked due to a battery hidden under the dash and there was an envelope with $1,000 in the glove compartment.
While we're telling old stories, I remember the car giveaway 55KRC did another fall when they had a new Cadillac and a new Lincoln. Also during that book, they gave away 550 turkeys. The turkeys were kept in a huge Home City Ice container in the parking lot for when the winners came for their prize. Big as it was, it would only hold a couple hundred turkeys at a time. When the winner of the Lincoln showed up to claim the car, Vance Dillard was pulling in the driveway - rear bumper scraping the ground - with the car absolutely stuffed with the turkeys: trunk open, back seat crammed, dashboard obstructed, piled to the ceiling with frozen turkeys.