#3and #7 coils are blown. Won't be able to buy them until payday. Now it is making a horrible knocking noise. I added oil. Added water to radiator. Please help. I live 30miles from my job. All rural driving. Will it leave me stranded on the side of the road? Need to find out what the knocking is. I'm scared. It's my only vehicle

The water will keep blowing out this it common on this motor the cylinders compression pushes air into water jacket forcing it back out most likely it is gasket or warped head but there is a reason for this weather it water pump thermostat or cracked radiator

does it have an electric fan added to the cooling system and if so is it working

Just from what you described, I feel like the problem is a blown head gasket. Just hear me out, because I can't see the car and I may be off base. Normally, I would say it's impossible to say what it is without a thorough checkout of the actual car.
One way to tell is to check for water in the oil [cloudy] This will indicate a blown gasket. one of the symptoms is [seems to run until it's under load.]Also this can happen during an 'overheating' incident like the one you have described. This is why I suggest this is likely the problem. Checking the oil is a fast way to tell it is, lack of water in the oil isn't always a sign or it not, but the presence of water in the oil is a sign of a bad gasket.

Yes, it is a blown head gasket or a cracked head.

Unless you drained the water from your block directly, you would have had about 2/3rds of your total water still in the engine. So if it got down below freezing then it doesn't look like your going to be using that engine anymore. Sorry to be the bearer of bad news. Unless I'm miss understanding and you did pull the plugs on your block, then you may come out okay.

white smoke usually means blown head gaskets,have radiator fan checked,water pump,check coolant for oil in coolant,could be blown in between cylinders,causing coolant to go out exhaust,have compression check done on cylinders.

depends on the type of oil in the reservoir!! Typical issues that will cause this on your 4.2L I-6 engine; 1. (usually pink/reddish oil) trans fluid leaking via faulty radiator, blown head gasket from overheating (severe), or someone accidentally added oil to your radiator!!

I wouldn't run the engine more than you have to until a repair option or replacement is found.

That noise means that the engine could get worse. I would park it until fixed.

I want you to take a couple of spark plugs out and examine them. If you find Anti-freeze on them then you may have a blown headgasket. A very common problem of driving a car until it overheats. I really do hope im wrong. Since it is an overhead valve engine with the cam shaft above...its a 1000.00 to 1500.00 dollar job to have it properly repaired. From here out im just going to explain why this happens...
When a car overheats - be it a faulty thermostat...low coolant...or a faulty water pump or improper coolant mixture ratio. The engine gets so hot that it actually makes the top of the engine change shape... it actually changes enough to damage the head gasket. The head gasket keeps the explosion inside the combustion chamber. Keeps the water in its coolant jacket. and keeps the oil inside its ports. When the Headgasket fails. Sometimes coolant gets into the oil (makes a milky residue form on the inside of the oil filler cap...or makes the engine oil look like chocolate milk.) or oil gets into the coolant (makes your coolant have an oil slick on top) It can also cause water to get into the combustion chamber and when the engine is running - blast the combustion back into the coolant (causes the coolant overflow to overflow or spray) or oil gets into the combustion chamber causing the plugs to get fouled (dirty). worse case...all the above happens. I hope this helps in figuring this problem out...i really do hope im wrong about a blown headgasket . As even i tremble in fear of it happening to my car. Good Luck!