need advice

well i just bought 1990 toyt supra turbo for 3000 i don't know if that is a good deal body is perfect i just need to replace drive belts and coolant because carsupposedly overheats it has not been driven for a year i also need to replace the exhaust and cat converter any body have an idea how much tha would cost? this is something new since my old car is a 66 must 289 V8 ac true classic well needed a change too much gas going to college figure might get something like a toyota amazed how strong that little car and and how beautiful well i really have not picked up the car yet next week though up north i live in redondo beach