Regarding the Hilux, as mention:
There is no relation between the overseas Hilux and North American TAcoma. Even the body is different, even though they look similier.
The frame, suspension, axles, transmissions and T-case are totally different. The Hilux did use the same 3RZ for a while, and the interior is very closely related, but that's about it. The Tacoma uses a coil spring front suspension, rack and pinion steering and different rear axle and diff and the T-case drops down on the driver's side. The frame is Dana built and is not fully boxed at the rear.
The Tacoma is basicly a 1/2 ton rated truck that is never intended to carry a load more than 1/2 ton. The Hilux is a 1 ton rate truck that is sold in both 1 ton and 1/2 ton model. The Hilux uses the the old style IFS and suspension that was introduced in 1986. They basicly took a new body and interior and dropped it on the same old frame and IFS. But this old frame and IFS design is far superior to the Tacoma design off road and for carrying heavy loads. The Tacoma design is far superior on the highway and handles and drives better.
I'll be really interested to see what Toyota decides to do with the Hilux after they introduce the all new Tacoma. The new Tacoma will be much larger and will still be heavily designed toward cruising the mall rather than the bush. I would imagine Toyota isn't going to sell the new Tacoma overseas as it probably wouldn't hold up to the abuse and they probably aren't going to design an all new model just for the low sales volume of the overseas market, so I would expect the current Hilux to be sold for several more years.
As for the South American Land Cruiser 80 series, Toyota does sell old 80 series in certain countries, specificly, Venezuala. Toyota owns a factory in that county and produces Toyotas there because that country has laws against importing a certain about of vehicle content from overseas. This left Toyota with a problem. If it wanted to continue to sell Land Cruisers there, they would either have to bring in all new tooling to produce the new 100 series, or just continue to produce the old 80 series for which the tooling already existed. With the low sales volumn it made sense to just keep building and selling the 80 series.
Toyota did the same thing in South Africa for a number of years. Rather than introduce the newly redesigned Hilux in 1989, they continued to produce the 1984 design through 1997. So you see a bunch of 1990s model Toyota pick ups over there that look just like our 1984 and 1985 trucks.