I used to have a 1997 Carina, which was similar to a Camry but a bit smaller and not so luxurious. It was before electrically operated seat adjustment. The drivers seat had IIRC a big black lever in the base. If you moved the front of the lever, the front of the seat would go up and down (with a spring) if you shifted your weight), and the back of the lever, the back of the seat. If you were not sitting in the seat, it would rise fully. I don't think the passenger seat had this. I think there was also an adjustment wheel on the inboard (at the middle of the car) edge of the seat, possibly for the recliner.
If you know anyone with a mobile phone that takes pics, or a digital camera, it would be very helpful to see photos around the seat.
I honestly think you ought to ask on that Toyota Owners forum. Tell them the year and model.