Water in combustion chamber

Yes. There will almost always be condensating release from your tail pipe. Don't put straight tap water in coolant. Water is not designed to handle heat of that magnitude. Mix with coolant or add pre diluted. But first find out why it is over heating. Check your thermostat

Yeah im sure it's the radiator leaking but i probably replace thermostat anyway looks like it original from 1997 oh and when adding water when its hot the water boils over and out of reservoir

Wait until things cool down then go from there. I would definitely look into changing your temperature control sensor as well.