I don't know about the Corolla, but I wouldn't be surprised if two of your questions are already answered simply by lifting your bonnet. The Aurion, built a year before your car has two stickers on the bonnet, one says how much refrigerant is needed for the A/C system, the other says when the initial change for the coolant is. In terms of age of coolant, just stick with what Toyota use. So for the Corolla, that's 10,000km per 6 months. So if your coolant is due at say 80,000km, then treat that as 4 years.