2002 LEXUS ES Exterior Lighting Problems

I OWN A 2002 LEXUS ES300 AND AM THE ORIGINAL OWNER. I HAVE ENJOYED THE EXPERIENCE OF DRIVING THE CAR TO AROUND 175K MILES IN NEARLY 12 YEARS. SO FAR, I DID NOT HAVE ANY MAJOR PROBLEMS WITH THE CAR UNTIL RECENTLY. LAST FRIDAY, AUG 8, 2014, MY WIFE DROVE THE CAR TO A FRIEND'S PLACE AND WAS PARKED IN A PARALLEL PARKING AREA. THERE WERE 3 CARS IN THAT PARKING AREA INCLUDING MY CAR IN 5 CAR PARKING AREA. THE TWO PARKING SPOTS BEHIND MY CAR WERE VACANT. MY WIFE WAS TRYING TO BACK UP TO A SPOT RIGHT IN FRONT OF ANOTHER CAR WHICH WAS PARKED THERE. WHILE TRYING TO BACKUP, THERE WAS A SUDDEN ACCELERATION OF THE ENGINE AND HIT THE CAR RIGHT BEHIND AND THAT CAR WENT AND HIT ANOTHER CAR THAT WAS BEHIND THAT CAR. THE IMPACT WAS SO MUCH THAT THERE WAS SIGNIFICANT DAMAGE...