Radiator tank is half full or the coolant overflow tank is half full?
You don't need to drain any trans fluid to see its condition, just pull the dipstick, same with engine oil, also check power steering, brake fluid fluids.
Well if it only has 99k miles it could only have had the TB changed once, so it has to have been very recently, so you s/b good on that expense for a good while - woohoo!
On front suspension, its the lower ball joints that go south early, so check those, there are vids on utube showing how if ya' don't know.
If VCs leak, just snug 'em up, mine were so loose i could turn them by hand.
How does it drive? 4wd engage/disengage well?
Luck!
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2001 Limited 4WD - 346+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.