Automatic or manual?
Manual has a fill and drain plug(s). Uses the 3/8" drive ratchet head to remove the plugs.
Automatic, I have no opinion. Many shops use a flush machine. Some DIY'ers just drop the pan, replace the filter and refill (leaving a lot of old fluid still in the torque converter).
Front differential gets sucked out.
Rear, take off the cover to drain. Use black RTV to seal the cover.
Transfer case has a drain plug under that damper.
Brake fluid, I'd suggest a vaccuum bleeder. Suck all the old out of the MC, fill with new (keep topping it off) and suck from each wheel's bleeder till new fluid appears.
It would be wise to buy a SERVICE MANUAL for your truck. Even the crappy Haynes and (slightly better) Chilton manual would have answered all these questions in an easy 1/2 of reading and looking at pictures. You'll be glad you bought it.
2000 2.5 MO5D 4.10 one-wheel drive DD - gave to my older son
1990 STX 87 2.9 going in.....Junked it
2000 3.0 4WD M05D 4.10 S-cab Off-Road package with 235-75-15" tires, hotrod DD, lol