4WD specs

i want to get a second-hand 4WD - but i'm finding it very hard to find out which make/model has what.

i.e. - locking diff front / rear?
LSD?
Fwhubs?
Central diff?
Permanent AWD?

is there anywhere I can find out which models have what? (in Thailand)
or does anyone on this site know their 4WD stuff??

i'm looking at virtually any potential off-road vehicle

Pickups
Pajeros
Fortuners
G-wagons
Troopers

....any other suggestions?

must be under 1 mil baht.