acf,
Diffy fluid - 80-90W 1.5 quarts (I use synthetic)
Trans Fluid - Toyota T-IV; pan drain will need about 3 quarts (don't overfill)
Brake Fluid - Toyota Dot 3 probably 3 cans
Oil change
PCV Valve
PS Fluid -
Toyota Dexron III 1.1 quarts ; but you might need 3-5 to completely flush system (this is not a recommended service - but check k9crews thread on the ls400 forum last week-very good!
Coolant - 2 gal "toyota long life coolant" w/ 50/50 distilled water mix. Refill engine block thru water filler plug on top of throttle body, then fill radiator and reservoir. Capacity it 11.6 quarts so you've got some extra to spill
Now, on the T'belt:
Replace water pump, L&R idler pulleys. timing belt tensioner, T-belt (of course), don't forget the serpentine belt!
Also, check plugs & wires & rotors etc....
Of course you need gaskets, Loc-tite,