1994 Dodge Intrepid

I have recently bought a 94 dodge intrepid about 3 weeks ago and ive had nothing but problems. Since buying this car I have put on fuel filter, ignition module, water pump, all new plugs and wires, crank sensor and the shop is sayin that its all they can do but the problem is that the cars check engine and cruise control light keep flashing off and on and the car is running very rough. The car will stahl at lights if you dont keep your foot on the gas peddle and the car doesnt want to go anywhere. I am a single mother an I need to get this car fixed because I am missing so much school due to these car problems and I sold the last car thinking that I was finally finally going to have a decent car. Will someone please help if u have any idea what the problem may be. Thanks for all the help an its greatly appreciated!