I agree with the advice about the automatic. However, except for problems with the auto transmission, my non-modified, 3.0 L, V-6, 1995 SR5 4x4 Pick-Up (not Tacoma) with almost 130,000 miles has been the most reliable and worry-free car I have ever owned. The automatic transmission seems to suck a lot of the engine's power and sometimes I have problems with it switching into overdrive on hot and long freeway trips (over 30 miles in the summertime).
I bought the truck two years ago. Its tires are 32x11.5 BFG's, which I am sure put a lot of wear on the automatic transmission; they are the biggest size tires I have ever seen on these trucks without having suspension modifications. They look good, but do not help with the gas mileage. During my first year of ownership, I closely monitored the gas consumption and averaged 15 to 17 mpg. That was probably 75 to 85% freeway driving. Since then we moved, and I have let my wife drive it (she has a shorter commute), she's not as big of a nerd as I am and does not keep track of the gas mileage these days.
With the price of gas these days, I don't know if I would buy this same truck right now. But if I were to buy a similar toyota truck, I would be sure that it was not automatic transmission and that the tires were not too big. I think if you go with the classic toyota 4 cyl and the manual transmission, you will find that you have plenty of power to do what ever you need to, and that you would get atleast 20 mpg.
Good Luck!
-Dan