I drive a tundra as well as someone else on here I know...gets about 15-20 MPG street/highway....I would opt for the solid rear window on any truck you get more area for advertising on the truck instead of on the paint....the 3 piece slider on my truck has been opened about 3 times in two years....not worth it!
I would have gotten a v6 to get better mileage around town, the V8 is overkill if you are not towing anything. Even a 4cyl would be better! I put everything in my bed, no trailer. If you are towing something really light <3000 pounds, get a v6 in a full size truck to keep costs down - insurance, gas, cost of the truck, maintenance, etc
look into the tacoma, silverado, tundra for trucks
if you are looking for a SUV, the tahoe is really nice and roomy and can be found for a good price cheap...same with the expedition
either route you go, never get a black car, and always keep it really clean