What noise, if any, does it make when it won't start? Coolant leaks aren't a big deal if it's leaking from the radiator. New radiators are fairly cheap and easy to replace, and you can buy stopleak for less than ten bucks. They're just pellets you dump into your radiator and they seal up any cracks in your radiator. You need to find out where the leak is.
DO NO replace the engine. DO NOT replace the transmission. That will cost much more than just buying another car...You may be able to find a dependable car for less than 1000 bucks.
Where is the noise coming from? Open up your hood while your car is running, it could just be a squeaky belt.
Your car starts for a little while and then stops again? What do you mean? It dies? When? It dies while you are driving? If so, is it while you are stopped in traffic or while you are literally driving down the road?
If it overheats even while it has water or coolant in it, maybe it is your thermostat. If it is your thermostat, typically, it can become stuck and unstuck randomly which will make the tendency to overheat unpredictable. That is cheap and easy to replace.
When it overheats, is there steam on the inside of your window?
If so, this could be your heater core...
If your car overheats while it has fluid in it, there is no steam on the inside of your window and it's not the thermostat, it could be your waterpump.
If your car overheats too much, it could crack the head or blow the head gasket.
I don't know what check gages or track off mean either, I've never had a car that said those things, but I also tend to ignore lights because often times, blown fuses are the reason they're even lit.
ps
yeah, using water isn't the best, but if you're leaking enough water to the point where you have to replace it every other day, it can be really expensive using antifreeze, and at 200,000 plus miles, I don't think I'd be worried about it. BUT, when the weather gets cold enough to freeze water, you better start putting antifreeze in it