No, it's not.
Both cars should have same kind of engine: either 4 cylinder or 6 cylinder.
it should go right in. I have worked for Toyota for a number of years and I dont see a problem there. Just keep in mind if you have a 4 cylinder use a 4 cylinder trans. Same goes true for a V6
Not really. You see the 1999 Camry had different chassis and configurations from any of today's Toyota car's chassis.
You add transmission fluid at the same place you check it.
No, they are different.
For Camry 1999-2001 (4 cylinder) the same transmission fluid is used to for both transmission and power steering. Some vehicles use power steering fluid Some trans fluid.
Camry 1997-2001 uses the same fluid for transmission as well as power steering.
NO the bore / cylinder size is different. Pluse the stroke
2.5L and 2.8L are the same. 2.2L and 4.3L are different.
YES it is the same block YES it is the same block
You should be able to... Just make sure that they both come from engine with the same displacement (I4, V6).
It is installed in the same tube you use to check the fluid. Do not overfill!