Why does my car just randomly die and does not idle right???

What is your question?

You will be driving down the road and the car just randomly shuts off! OR when pulling out from a stop the car just dies!! It always starts back up but that is so dangerous!! And it makes a crazy noise like the starter is) and your in a hurry to keep from getting hit at a redlight or something!! It stalls a lot!! I don't know what is wrong with the car it idels up and down going down the road and at a sitting still position!! And the air constantly is going from hot to cold! That is crazy too! It does not work worth a crap!!