Had to get a jump,instrument panel ,quit, no heater, no power windows, truck started backfiring after oil change was running fine until changed Draining battery

My truck got an oil change, and they used thin oil, and the enging started vibrating really badly. I took it to the mechanic and he said I should use thicker oil, and they changed it. It worked somewhat alright. But after I drive 6 miles and make a stop, the engine starts vibrating badly again, and I have to leave it to cool down for 30 minutes. They told me to change the timing belt, but I did it and it still does the same

Put key in ignition and have power for dash etc but when try to start nothing happens.No crank at all. Starting system fault shows up,as well as advanced trac, brake system and oil change warning. The latter codes randomly showed up one day when driving. The starting system fault appeared when just sitting , not running, while trying to charge old battery. The battery said full and I tried starting it and fault appeared. Both factory keys/ fob do the same. I have a new battery ( did it on old battery too) I have tried disconnecting/ reconnecting battery. Have checked the fuses interior and in power distribution box as well as the ignition relay. Have made sure the connection in the inside fuse box is good. I have run out of things to check. Could it be pcm relay?

Cruise control quit working ,uses/or loses oil between oil changes.

My truck has the wrench light on the dash. I had the transmission serviced recently and the coils replaced. Also did an oil change. I replaced my mass air flow sensor myself.