The 4X2 stands 75.8 and the 4X4 stands 76.2
It's just a name.
a 2008 Toyota tundra weighs only 5520 lbs and its max weight with cargo is 7100 lbs. its max cargo wt is 1580 lbs.
The SR5 is the standard package on a Tundra
No Not in the USA.