2008 LEXUS GS460 Traction Control System Problems

I HAVE A 2008 LEXUS GS460 WHICH WAS HAVING ISSUES WITH NOT STARTING, ON TWO OCCASIONS IT NEEDED TO BE JUMP STARTED, ON THE SECOND OCCASION AFTER BEING JUMPED, I WAS ADVISED TO DRIVE TO THE LEXUS DEALER TO HAVE IT CHECKED OUT AGAIN. AS BEFORE, THERE WERE MANY "DUMMY" LIGHTS LIT UP ON THE DASH BOARD, ONE OF WHICH WAS THE TRACTION CONTROL LIGHT WHICH I ATTRIBUTED TO THE BATTERY BEING DEAD. AS I WAS DRIVING TO THE DEALERSHIP, I ACCELERATED SLIGHTLY (ABOUT 30 MPH) TO PASS A VEHICLE THAT HAD STOPPED TO MAKE A LEFT HAND TURN AND MY LEXUS STARTED TO FISH TAIL ACROSS TWO LANES OF TRAFFIC, THANKFULLY I DID NOT HIT ANYONE BUT I DID CRASH MY CAR INTO A SNOW BANK, CAUSING DAMAGE TO THE CAR AND A MINOR CASE OF WHIPLASH. THE DEALERSHIP TOLD ME THAT THE TRACTION CONTROL WAS NOT FUNCTIONING DUE...