Correct me if I'm wrong, but isn't the 4-Runner RWD and/or 4WD? So, if you can't town it 4-down, how do you expect to keep the rear tires from turning the transmission? Toyota does not make any vehicle that is 4-down towable.
Also, with a dolly, you can only tow FWD vehicles or tow a RWD vehicle backwards.
However, you can purchase and install a driveshaft disconnect that will disengage the driveshaft from the rear-end, making it 4-down and dolly towable.
Ron, Sandie, and Maggie May
2013 Tiffin Phaeton 42LH
2011 GMC Terrain SLT-2