Okay, my car broke down at a light. When I tried to restart it, it turned over but it kept clicking, a continuous click. My lights still come on, radio, windows go up, etc. I pressed on the gas and it gave me nothing.. did nothing. just went straight to the ground with nothing. It is still broken down, still won't start. I will need a tow. What could this be? And how much do you think this will cost me?