Heater core- Mini radiator that heats the air for your heater, air runs through it when it is filled with hot coolant
Evaporator- Contains aircon refirgerant, air runs through it too cool your car
Coolant temp- Ferenheit in 97 C280
Refrigerant pressure- Pressure of refrigerant in A/C system
Poly-V belt- Drives all the accessories, A/C compressor, coolant pump, power steerin pump etc.
Battery voltage- voltage of the battery, self-explanatory?