2004 PRIUS WONT START

Little back story. Last year during an unusually rainy spring I had the red triangle and brake warning light come on while driving. Kept driving normal until i parked it. Once park i could not get it to go into drive or reverse, only neutral and park. Pull the negative on battery, let it sit, hook back up and down the road i go. This happened several time during the rainy season. Once the we went into our normal texas dry spell the car was fine. Fast forward to present. Went to have new tires put on and on the way home i come to the turn off to my house. Im slowing down, assume the engine shuts off like noral as im coasting and when i turn onto my street and press the gas pedal engine does not come back on and red triangle and brake warning light comes on. Im a few 100 yards from home so i go the rest of the way on electric. get home, unhook battery , hook battery back up and nothing. Red triangle, brake warning light and no Ready mode and no engine start. scanner showed code for gas pedal malfunction. replaced it, still nothing. only other code is PAO94 for dc/dc converter performance. Ive checked all fuses, fusible link, verified my 2 year old axillary battery is good. No repair shops withing 100 miles of me. Any help would be greatly appreciated.