Yesterday I drove vehicle to the store. When I got back in car I tried to start the car it would not start. When you open the door you hear a clicking noise and the interior lights blinks on and off. When I tried to jump start the car and start it the horn blows. Every time I turn the key to start the horn blows. When you take the jumper cables off the car and try to start it, the vehicle goes dead except display menu, radio, and the clicking and blinking light. Brought the car used it did not come with a key fob. What could this be?