Jayr 
2007 Toyota Prius Hatchback 4dr Hatchback (1.5L 4cyl gas/electric hybrid CVT)
Whats wrong with my brakes?
 I purchased my car in May of this year as a used vehicle. I loved it until last week. I was sitting in my car, which was off, when i turned the car on it asked me to get to a level ground and take the e-brake off. I would have except I was on level ground, the e-brake was off and my car wouldn't start. My dashboard had all my brake lights on. 4 hours of assistance and towing and they told me it was my battery. Exactly one week later, I was driving down the highway, less than a mile from my exit when my car started making a beep noise, and again ALL my brake lights came on. This time my car was in motion and the brake pedal would not work, it was rock stiff as I went 60 mph on an exit ramp.