2012 LEXUS CT HYBRID Engine Problems

ENGINE KNOCK DURING IDLE IN MORNING (COOL CONDITIONS, NOT COLD).BUT STILL SMOOTH DRIVING AND NO OTHER OBSERVED ISSUES. THEN TWO DAYS LATER THREW CODE P0301 MISFIRE, AND NEXT DAY WHITE SMOKE (COOLENT RESERVOIR DECREASE) AND APPEARS TO BE BLOWN HEAD GASKET. ENGINE ONLY 122K MILES, FULLY SERVICED WITH SPARK PLUG CHANGE AT 119K. NHTSA SERVICE BULLETIN L-SB-0028-13 MAY INDICATE LINK TO EGR VALVE/LINE BLOCKAGE. DEALER NON-RESPONSIVE.

1) A LIGHT IN A DASHBOARD CAME ON SAYING "CHECK HYBRID SYSTEM", I TOOK IT TO THE LEXUS DEALER , THEY CHANGED THE NON HYBRID BATTERY), CHARGED ME $350 FOR IT AND RESET THE COMPUTER. 2) A WEEK AFTER, THE LIGHT STARTED APPEARING AGAIN WITH THE SAME MESSAGE, THE MESSAGE APPEARED IN THE MORNING, IN THE WAY BACK HOME, COMING OUT OF THE SPEEDWAY , ALL THE LIGHTS IN THE DASHBOARD CAME OFF (BRAKES, ENGINE, ALL OF THEM) AND I LOST COMPLETE CONTROL OF THE CAR: NO BRAKES, NO STEERING, NO NOTHING. I TRIED RESTARTING THE CAR AGAIN, IT DID, AND THE NEXT DAY WAS DRIVEN TO THE DEALER AGAIN. THEY TOOK IT IN, HAD IT OVER 2 DAYS, SAID THAT THEY FOUND A "LOOSE CAP IN THE HYBRID BATTERY", RESET THE COMPUTER ONE MORE TIME AND GAVE THE CAR BACK TO ME. 3) THE CAR DID NOT FEEL THE...