Sorry for the delay or if the pic is a bit big. That's what my cables look like at the engine end. I reckon that there is enough slack that the if you press the box inner cable in the centre of the span between the adjuster then there is about 2 to 3 mm deflection before it feels like there is tension to pull the inner cable. I don't recall ever adjusting this cable only disconnected at the box end however the auto box specialists (Suffolk Automatic Transmissions - who really knew their stuff and seemed very thorough) probably have set it as it is now (or at least checked it) about a year ago. If you want any other pics or measurements then please feel free to let me know.
Glad things seem to be sorting OK so far for you.
My Toyota Owners Manual states.
Coolant Diesel Auto with rear heater 11 litres.
Coolant Diesel Auto without rear heater 10 litres.
Toyota Long Life Coolant.
ATF Dexron II / Dexron III
Up to 2.0 litres for a drain & refill.
Roughtrax claims 10.1 litres from a dry rebuild. A full flush would be best. There is some Oz method on forums (probably prado point) where it is done by disconnecting the cooler hoses and pumping old out while sucking new in by starting the engine. You will see the colour change and will likely need more than the 10.1 litres as you will waste some in the flush. Without it operating you won't get it all out of the converter or the valves or other nooks & crannies.
Edit: I barely notice my glow plugs going on but it starts fast on first turn of the key. Just over 215,000 miles. Temps currently 5 to 10C here.