My a/c is blowing warm air. Do I need freon? Which kind it is for a Toyota Solara 2002.

Go to autozone they have a quick fill can with an easy to read built in gauge and hose. As long as your system is not completely empty this might help. It should come with instructions that tell you where the low side service valve is at. R-134a is the kind of ref. They will give you what you need just tell them the model car.