Your coolant recovery tank is empty do you need to add antifreeze?
If the vehicle is cold yes but make sure you mix the antifreeze with water before you add it, 50-50 is the best mix.
If you are talking about the low coolant light then it is just low of coolant. Add coolant to the recovery tank. If you are talking about the coolant temperature light, then the engine is overheating. You may need to have the cooling system serviced. Drain the coolant and flush the system. Install a new thermostat, and add a 50/50 mix of antifreeze and distilled water.
How much coolant does your car or truck hold? You want to have one half pure antifreeze and one half water. If you want to mix your own and if your car holds 4 gallons of coolant then you need 2 gallons of distilled water and 2 gallons of antifreeze. Or you can buy the kind of antifreeze that is already mixed called "PRE-MIXED COOLANT" at most part stores and just fill it up.