Electrical failure i guess

[hasitha1993]

hey guys..
i own a 2007 yaris sedan... today i experienced a breakdown issue for my entire yaris life time which made me so upset about my car and it broke my trust with the vehicle. Its being 6 years i'm using it and never gave me a single trouble but suddenly this happened.
while i was driving about 160Kmph my car was suddenly stopped (engine turn offed) and i just parked it aside the road. when i tried to turn it on P/S ABS and handbreak indicators were on and steering wheel and break felt hard. No A/C, power shutters, power mirrors, radio, signal lights, break lamps, wipers, central lock. (Head lamp and Hazard is working) But the car is running perfectly
i dont know whats wrong with my car and i guess there might be a problem with ECU.
If anyone know a solution or cost for any replacement.. i would love to know it. PS under Toyota company maintains.