I bought my first 4Runner(and first Toyota) in January. It's a base TRD Offroad and it came with a rear locker and traction control.
Don't confuse traction control with any kind off off-road traction device. It's for slick roads only and won't help a bit in off roading. My Dodge Ram has it and I hear all the time how the 'lockers' on these pickups don't work. It works very well for it's intended purpose. It's a means of controlling slippage on slick roads where the computer will use the brakes and throttle to slightly slow down a slipping tire so it can regain traction.
If you meant Crawl Control instead of traction control, that's something else entirely.
