Im fairly certain it is 2 pac 045 White (Also called Super White, and Glacier White)
The actual brand or composition would be harder to ascertain, from what I understand Toyota doesn't make it themselves they outsource it to manufacturers near local assembly plants.
Its a pretty decent base coat to start with, unless your going for showcar grade finish....
For a bush pig, I've seen amazing results with thinned out Wattle SolarGuard and a foam roller!