Araygoza100

I have an 06 tc with 78k miles. Love my car but latley it's been acting strange. One it idles rough. Two the pulleys are squealing. Three I am sure there's an engine leak somewhere. Four it randomly overheats. If I turn off and restart my car it will cool down. Could this be a failing water pump? The check engine light came on and when I scan it it shoots out codes for bad oxygen sensor and coolant temperature sensor low voltage. I replaced the temperature sensor aND now it seems to be causing my coolant resivour to overflow.
any thoughts as to what might be causing my issues?