Tire size can be found on a placard on the inside of the glove compartment door or on the driver's door jamb below the lock striker. Also in the owners manual. You do have a manual? Any car for sale that doesn't have the owners manual and the maintenance records should be suspect.
The tire size is on the tire itself. Example : 175R14. Its located on the sidewall of the tire facing you. Check the size on both. if they match, then yes. If not, then no.
The standard spare tire size, for a 1999 Toyota Camry, is 135 R55 15. The spare tire size is smaller than the standard tire size.
P185/70r13
P195/70R14 90S
p195/70/R14
195/70/14
P195/70R14 would be the stock tire size for the front, rear and spare tire.
205/65HR15
195/70R14
P205/65/r15
185/70/R14
205/65/r15