I have a 1993 Chrysler Le Baron Convertible with.

I have a 1993 Chrysler Le Baron Convertible with a 3.0L/V6 Engine. I bought this car last week and the second day I had it the serpentine belt broke which the engine has two belts (one ribbed belt for the Alternator/Power Steering/Crankshaft/Idler pulley/tensioner pulley) and a V belt for the others. The idler pulleys baerrings siezed up so I replaced it along with the belt. Up until yesterday the car started right up everytime and ran pretty good but started to overheat if ran for a longtime and at a stand still but did not overheat while driving, only when I came to a stop for longer than 2 mins. Yesterday while I was at the taco bell drive through I was at the window for a long time so I decided to turn my car off while waiting, the temp guage was climbinmg but did not reach full heat. So after my food arrived probably 3 mins after I turned it off I went to start it and I got absolutely nothing not even a attempt to turn over everything came on like it was noirmal but when I went to turn the key to start it up my car didnt make even a peep kinda like the car was still hooked up to the ignition electrical wise but the engine itself weasnt responding I feel like I have to explain exactly what I mean by nothing. When the key was half turned it makes the electrical clicking noises but when turned al lthe way I get no noises from electrical or engine turning. What could the problem be? How does a car that starts up everytime first turn in 1 second go to nothing in 3 mins?