hard brake pedal, will not start. will not turn over

Third time to visit the repair shop! Brake pedal is hard as pushing against a wall, on rain slick roads the ABS locks the rear wheels. When brake pedal is hard to push, car will not start...once towed and repaired (brake sensor) failed again with other problems subsequent......including a repeat of the hard pedal and no start plus a very loud grinding of the front brakes and continued failure of the ABS on rear wheels.