A radiator gives off heat not prevents it.
No
When you drive your car or ride your bike, energy is converted and some of the energy is lost as heat. That is why cars have radiator to prevent overheating.
Oil is not a coolant, it is a lubricant, but it keeps the engine lubricated to prevent friction, which reduces heat and makes is run cooler. Water in the radiator, and the radiator fan, is what keeps the engine cool.
A white surface is a good radiator of heat.
a radiator that provides heat and cooling
As coolant cycles through the engine, it absorbs heat from the engine, after which, it continues through the cooling system back to the radiator. As the coolant passes through the radiator, the heat is exchanged to the ambient air by way of airflow through the radiator fins (this is why it's important not to bend the radiator fins).
Radiator is a device to cool the heat engin using water as a coolent
No. The problem is most likely your heater core. Ask a mechanic.
heat
In your car, the radiator transfers its heat to the surroundings - the air. [Strictly, this is conduction, but don't quibble. This is mechanic talk.] In your room, the radiator does radiate heat into the room.
heat absober absorbs heat & refelector reflect it
To transfer heat.