Transmission Not Go Into Gear problems of the 2009 Hyundai Accent

1st incident: car was parked at store. Would not start and could not move shift lever while depressing the brake. Electrical system down. Called for tow, mechanic jump-started the car. 2nd incident: since the above time, we have had to manipulate the brake pedal several times to release shifter, then firmly move shifter into park, allowing the car to recognize that the car was not in gear, then the car would start. 3rd incident: April 24th, 2013. Entered the car, heard clicking sound from the direction of the inside fuse box. Tried to start the car, no power anywhere, car would not start. Depressed the brake to repeat the shifter steps as in incident 2. The clicking stopped. The clicking only stopped when I depressed and held the brake with the ignition switch in the on position. Still no power and car would not start. As I depressed the brake, the electronic odometer display went to half-numbers. When I tried to turn on the flashers, there was a "static noise" from the dashboard. Flashers would not work. Returned the key to the lock position, depressed the brake pedal. The odometer reading flashed on and off several times, then came back fully. Had to have the car jump-started in order to get home.