Vsc system on and doesnt charge the hybrid battery

What is your question?

I have a 2006 toyota highlander hybrid with 111576 miles on it, first it was happened when im on the freeway and when i steping on the gas pedal i feel like the engine doesnt want to accelarate anymore and after a few miles the engine dies and dont want to start again and tried the gas cap remove and put it back click more than once and tried to remove the negative from the 12v battery but i failed. I dont know if the 12v battery is new or not because when i bought the car it was used and i check the 12v on its navigation and it was read only 11.7 volts headlights on only, engine not turn on, i hope anyone can help us thank you

How long has your 2006 Toyota Highlander had this problem?

Yesterday