For your purposes KM2s or GY MT/R.

Are you going down there to adventure, or humanitarian aid work or something?

I would keep the bling wheels at home though. I would recommend getting a set of steel wheels. If you damage one you will be able to find a replacement quickly, and no one will want to steal them.

Just a suggestion.

The Latin America region gets the 4Runner so finding replacement things and service probably won't be too much of a problem. The mud in South America is unbelievable. If your budget allows I would get a winch and a front ARB locker. I would also get some other recovery equipment and take a recovery class if you do not have much experience. In some places, if you leave your vehicle to seek help when stuck, it is fair game.

Be safe down there.

P.S. I hope you are not going alone.