@JazzTX
You also have to have in hand a paper copy of RM998U, Toyota Repair Manual, Automatic Transmission (2002). You cannot do this job without it. I have not found a digital copy anywhere. Sonnax has them for transmission shops, but you have to have a subscription, and I'd guess you don't want to blow cash on that. The general purpose repair manual, RM745U, is in the Resources section, and you'll need a copy of that to get the unit out of the truck, and for a couple of other things.
Based on what's in your pan, I'd guess you're missing a few plates, as well as the friction clutches. These are not included in the rebuild/overhaul kit, so you have to buy them separately. Unfortunately, you won't know what you need until you tear the unit down. The good news is that if your transmission was working, just not well, your bearings and drums are probably OK, as is your brake band.
You need these two items, which are not in the repair manual as "you need to replace these because you ruined them getting them out" parts:
They go together. You have to remove the shaft to replace the two seals on either end of the shaft. The seals are in the overhaul kit; the "spacer" and pin are not. PITA
You will also need a couple of special tools.
a) I have a transmission case holding fixture, designed to be clamped into a bench vise, but you can set the case, tail down, on a plastic milk crate, if you want to. It'll be really low, but it'll also be really cheap.
b) you need a pressing tool, to disassemble the clutch subassemblies. You will damage the spring retainers if you use a press. I did. You can either buy the Snapress (I did, it was worth the money) or make your own tools (a piece of threaded rod and flat bars of various sizes will work).
These things are alternately scare as hen's teeth and all over like weeds. I think it depends on the phases of the moon. Or something. You can get a better price than this. DO NOT buy this:
Total garbage.
c) the longest external (expanding) snap ring pliers you can find (at least 9", 12" would be better) - you need the kind with bladed ends, not pins
I made do with two pairs of these; it was frustrating.
d) a 12 inch flat head screwdriver (2 would be better, but I made do with one and a couple of 8 inch long 1/4" others).
I highly recommend you email
Dave Stedman and get your parts from him. You'll get genuine Toyota parts at a good price and Dave can get what most everyone else cannot. You will need to have all your stuff in one sock, prior to giving him the order.