I think Demonoid has summed it up just about right.
A lot of factors come into play when considering a TLC 80. I have kept 2 so far, one had a 1HD-T and the other 1FZ-FE under the hood.
If you are thinking about going for this SUV there are a number of things to check beforehand.
Firstly, you must make certain that the rig has had no body change and is cleared by customs. There are 2 ways to do this. You can take a picture of the 'tikki' located in the engine bay. It will have the frame number/chassis on it. You can tally it online. The otherway to do it is by checking the text label on the seat belts. Depending on the model, the interior would match the number on the 'tikki'.
Once you do this and know that the rig is clean on paper, you would need to check the usual (engine/tranny/suspension/4x4/body etc.)
I would advise you to stay away from the petrol 1FZ-FE versions. They are guzzlers at 4500cc, 6 cylinder. Mine used to give me an average of 4km/litre. Ideally, you should get one with a 1HD-T, its a solid engine as long as you find one in good condition. I used to get around 8km/litre with this engine in city.
The prices on these vehicles vary, there is a huge range. They can start as low as 1mil and go upto 2mil, again depending on the condition, model and registration. NEVER go for the 1mil ranged 80 Series, you will always end up spending a lot on them just to make it up to par to serve your requirements.
Maintenance is not cheap at all and sometimes you might have to order parts from Dubai. I had to procure a timing chain and fuel pump for the 1FZ-FE, owing to the fact that these parts were not available in Pindi/ISB and were simply not the same quality that one would expect from original, brand new parts.
Now, provided you find an 80 Series in good condition for the right price, it is an amazing machine. Very comfortable, reliable and an all rounder. Whether you want to use it as a daily driver, tourer or offroader, it will serve all these purposes without too much customization. For offroading, you would need to work a bit on the suspension to give it some clearance.
Best of luck and do keep us posted!