Cooling system - Most cars are water cooled. They have a water pump and a radiator. The water cools the cylinders then itself is cooled by the radiator. Cars such as Uzman's beetle is air cooled where the cylinders have fins to cool the engine. The air cooled system is lighter but vastly more inefficient. The rally dons among you will be thinking of the Subaru STi4 water cooling button. This temporarily cools the engine further making the gases inside the engine less dense causing it to produce more torque.
Starting system - When you turn the key or press the button in a ferrari the sarter motor spins the engine a few times so that combustion can occur. This is no easy feat and therefore requires a 12v battery and is also why the lights dim in the car when the engine is started.
Electrical system - Battery and alternator. Alternator is connected to the engine by a belt and generates electricity to recharge the battery.