No air is coming from my Defrost,or A.C. I hear it click on but no air

OK I've replaced ,my spark plugs my spark plug wires cleaned the mass air flow sensor & all the connections. After driving home and my car loss power on the freeway and shut down when I coasted into the gas station the front of my engine was on fire temp gauge got to half way and my radiator was dry all other fluid was fine though. I checked everything and replaced everything that was damaged. After it won't start I replaced the crank shaft sensor which was a pain, and had to replace my serpentine belt tensioner I've poured a little bit of gas down the air filter still nothing it getting fuel I've checked and spark to every plug. Any ideal I have less the two weeks to be out of my home and need my car I'm low income and have no where to go and have a nine yes old son

It's a 3.8 liter 3800 series engine I took an hour-and-a-half trip away from home and on the way back it started lasting power on the freeway and I noticed the temperature gauge got up to about halfway it shut down and I coasted into a gas station where I open the hood and the front of the engine was on fire and torched my spark plug wires and that's it no other type of wires or anything else I replaced my wires and I pulled all my plugs and all my plugs are fouled besides one I replaced all those I try to start my car again and it still won't start and it doesn't sound the same as it used to I've had cooling problems with the cooling system in the past and my thermostat bleed valve was left a tiny bit open so somehow and rather my radiator completely drained in that process any ideas on why it won't start

I sent and wrote my problem at least 5 times

I had the manafoil gasket replaced but they let the sealer dry then the next time they just put on more gasket sealer' now it leaks more and the oil is a milky color. is my engine gone? or is there anything I can do?

The temperature goes all the way up until the red light comes on and then it goes all the way back down to the middle and then I'll ride for a little bit and I'll do the same thing

shutters and shakes, then dies

I have a 99 Oldsmobile intrigue and I had water in my floor board the other morning and it was running hot so I replaced the heater core yesterday and drive it about 10 miles it seem to be alright then it started running a little hot and the blower kicked down on its own then back up again but was blowing cold air then instead of hot, so a little bit ago I changed the thermostat and its still running hot and no heat? What could be the cause?

I was wondering what that means? I'm driving from Wisconsin to Colorado And I just had my water pump replaced in Iowa. Is it safe to keep driving or do I need to find another shop.