Well, I think it's pretty darn odd that you want to pull a Tacoma with 3 horses. Why not just get a proper wagon or Amish buggy or something. A Tacoma is pretty heavy for three horses to pull, but doable. Draft horses?
Seriously though, drive the yote into a pond and get a 1ton Superduty. I won't pull 3 horses around with anything less. In fact I want to recommend a dually. I drive a 250, being converted to a 350, and even I feel like 3 horses is a decent challenge. A Taco is just plain suicide.
I've seen people try 2 horses with a Tahoe, but it was pretty pathetic.