I had an 08' Tundra with the smaller V8 (2wd) when I got My X45 about 3 years ago.
The only problem was about half the boat ramps I use, the rear wheels would spin when trying to pull the boat out. Usually would need a couple guys jumping up and down on the bumper for traction. Otherwise it pulled the boat just fine locally and did pretty well on the Houston to Austin trips, and would struggle slightly on steep hills though at highway speeds.
I went out and bought an F250 which may have been a little overkill to pull the boat, all you need is a 4 wheel drive gas truck. 4X4 is the key, even the F250 spins the rear wheels at the same docks if not in 4wd.