How and what type of freon do you add to a 1995 Toyota Avalon?
It's almost impossible to get the old stuff now, so you it doesn't realy matter. You'll need to use 134A in your AC system.
When you are going to add Freon to a Toyota Camry, you need to know which type to add. You will need to put the Freon recharging coupler to the recharging kit, and get the engine to operating temperature. When the engine is at operating temperature put the air conditioning on the lowest setting and recharge the Freon with the windows of the car rolled down.