OK. I finished this about a month ago. Photographing, and then getting them to the computer is kinda a pain. This kit was from 1983, and as I suspected the decals were shot, even after two coats of clear, and a coat of Future they turned to crumbs. I tried to replicate the missing hose, but after two failures, I just modeled it as battle damage.
Probably not a whole lot in 1/25th. There are tons of 1/24 figures from Fujimi, Hasegawa & Tamiya. Fujimi drivers set. Fujimi Mechanics set, also released in Testors box, also many vehicles that come with racing drivers. If you want pre-painted figures, you'd probably want to look into G-scale railroad figures.
Those are some great looking mechs. I'm not too knowlegable about Gundam, even though it's been around forever. I did just finish a vintage 1983 Flying Gouf. The feet are so oversized he can't stand up properly.