Real world MPG in the Tacoma is laughable sometimes. My '21 averages 20-22 in the warmer months, but with the recent cold snap I'm lucky to keep around 18-19.
It is a very capable machine on and off road though. With good tires it's very good in the snow.
If you do live in the salt belt you will need to protect the frame. I'm pretty sure it's still the same frame since 2005 with just some minor tweaks, even though they said they corrected the issue. Frame on my '21 looks the same as my '09 and '14's were. I had to sell my '09 due to rust (and other things, but mostly rust).
The 3.5L V6 will not have the same get-up-and-go as the Ranger's Eco-Boom engine. It's seriously lacking down low, but if you mash the skinny pedal it will go just fine.
If you want a manual you're stuck with upper trim levels; TRD Sport, TRD Offroad, or Pro. So $$$$$$
There's a lot of people complaining about the seat and how you sit in it. I for one don't notice it, but I'm short. The seating position in the 3rd gens is better than the 2nd gens, IMO, and I've had two 2nd gens.