It's definitely a 4 speed torque converter automatic - I've upgraded the ATF cooler when we had the box out to service it.
I find getting parts for my one very interesting. My late farther (who worked for Toyota for a time) wondered if it was one of the early press release cars as there is so much on it that does not match any of the manuals. Even the wiring diagrams are completely wrong - there is no can bus in this one, even though his 2003 model had it.
Luckily, my brother works at a car parts supplier, so he has access to most of the lookup tools and we can usually find a substitute.
It's a fantastic car, with the only thing negative to say about it is the fuel economy - 17 MPG seems to be what it does, almost irrelevant of how and where you drive it.
I've been looking for a while now for an upgrade, as I'm conscious that ours is 23 years old and has done almost 200000 miles, but it's so hard to find anything that fits our needs. We need 3 seats in the middle row, which sadly rules out most of the newer ones, with the 8 seat option limited to the (in my opinion) underpowered i4 engine.