You don't have two buttons on the far left side of the gauge cluster to let you choose between the regular and trip odometer? One of those two buttons is the Reset button. I believe they all have them. I've never seen one without. They're small and silver and blend in to the gauge bezel.
Correct, my 2006 V6 4Runner does NOT have the two buttons shown to the left of the gauge cluster in the youtube video link above. There are no buttons there. I have the classic push "needle" that comes right out near the temp gauge (I assume the MAINT light reset just works the same way using the needle instead of the button):
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