Power Steering Light On problems of the 2011 Toyota Venza

The Toyota Venza 2011 has problems when the temperature inside the car is at high. The abs light turn on making it hard to steer. The traction lost control light also turns on. A red steering wheel light turns on. Once all these lights are on, then the ac does not work and the heat doesn't work either. In the winter when the temperature is at high, the same problem occurs. In the summer the same problem occurs only the sun heats up the car causing the same warning light come on and then I can't get any air conditioning again. I've had this problem for many years. Went to the Toyota dealership to try to fix it but they haven't fixed anything. They just charged up to $700 and they haven't fixed anything. They did a computer resets and computer diagnostics. The Toyota dealerships have tried to fix it but none of them are able to find out what the problem is. Also, when the ac is on during the heat up the engine fans that cool off the engine stop working. Our cars engine stopped all of the sudden really recently when it was really hot. From an auction.