I’ve already ran into this. The 5S-FE engine oil pumps frequently develop a leaky oil pump seal. I’ve already resealed one on a 1996 Camry with the same engine as yours.
If the leak is very fast, believe me, it’s the oil pump, not the oil pan. It can be done in a day, or better yet, in a weekend.
If you’re going to tackle this, get the timing belt, cam seal, crank seal, the tensioner and the water pump. Everything under that cover will be soaked.
If the oil is dripping with the engine running, there’s no way it’s the oil pan gasket.
By the way, for you guys wondering, it’s the last seal in the pictures that is the REAL problem.
It gets hard as a rock, flat as a board, and often splits as well.
On the car I worked on, the other seals weren’t in much better shape.
http://www.6gc.net/forums/index.php?showtopic=66996
Good luck!