No crank no start after overheating, OBD2 faulty or ECU faulty

I've been having multiple issues with the car. The door actuators to all doors work when they want to, they just make a buzzing sound. Depending if the cars ignition is on the start or off position some will work. The A/C stopped working and appears to have a leak and when I had recharged it the car overheats. I'm assuming because the fans are not turning on either. The car belts squeal loud when I start the engine at times not all the time but then as I drive, I push on the gas, and it gets louder and then just stops squealing.
the car gives a rotten egg smell and a rattling sound at times The overheating happens randomly and sometimes the temperature gauge will read half way but when I turn off the car and get out I'll hear a bubbling sound which I found comes from the air bubble being pushed into the reservoir when I connect my scan tool to the ob2 port will connect and turn on but then when I move the scanner it turns off not all the time, but I do get it to read the codes by holding it still while it read but if I move it turns off but I'm not sure if it's giving me the right codes all the time. Because it sometimes goes away and then later comes back. Now it says it reads no codes but maybe because I think my kid erased the codes by mistake. The codes before were p0660 something about a turbine speed sensor and the other. I'm not sure but it said lean mixture on bank one or something like that. I want to say p0170 would have to double check but I know it was something about the fuel air mixture any. It started when I was driving one day and the car just began to overheat out of nowhere, I let it cool down topped off with water later bought coolant. While driving it began to overheat and then turn off on me I found that it was a tensioner that fell. Off and when I replaced. It everything began to function properly but later I started noticing coolant on the ground but couldn't find the leak it started leaking inside the passenger floor thinking it was the heater core but the heater was still giving hot air, I reverse flushed the core but only clean water came out the other side no broken up dirt nothing Soni but everything back but I'm afraid I may have clogged the core because it began to overheat and when I turned the heater on to help. The engine it was fresh not cold but a low temp air coming out later it started working again because it would not over heat confused about the water on the passenger floor, it had an also been raining a lot thinking maybe the drains are plugged I found what appeared to be the drain for when it rains and when I stick a pipe cleaner in there nothing either came out or any dirt or debris on the pipe it stopped leaking in the floor and it stopped leaking outside when I bought a coolant sealer. Still confused about what cause the water on the floor. I was told it could have been my A/C that leaked water to my floor and since my A/C stopped working I gave up on that everything was fine until I tried finding the leak on the A/C and the car overheated. I stopped left it alone let it cool down and continued to use the car normally. Several days later on my way to work the car starts making that rattling sound halfway to my job the car seems to lose power. I look at the gauges everything seems fine but I make my way to the shoulder because once I let off the gas and attempted to accelerate again it would lag big time and the rattle sound would get louder. I looked at the gauge and then the car temperature move up quickly, so I began to pull over and turn on the heater at the same time. I pulled over no hot air came out so I turned it off thinking that would make it work harder, I opened the hood to allow it to vent and I figured to turn on the heaters anyway so I did. It cooled down to about halfway when I attempted to start but it wouldn't it just made a sound that remind me of toy cars the ones. That you have to with your hand and arm rev up first for. A little then just out it down let go and watch it take off that's how it sounds when I start it. I was told maybe it's the head gasket. So, to check I removed the ignition coils struggled on C1 the rubber boot seemed a bit worm out but I found no water in the well on C2. I struggled to remove the coil pack and unfortunately pulled to hard I broke half in there but I was able to pull the rest out and the bottom was melted the ceramic or plastic part. I took off the spark plug found no water on the plug either but I stopped there because I didn't want to break the other coil pack on c4 which also I'm struggling to get out. I know it's a lot, but I'm hoping you help.