RealSense SDK does not provide a full body skeletal tracking as the Kinect provides. It only gives you hands and head tracking.
Also, you would need a longer range camera, like the R200, and implement it yourself. It's not a simple thing though, have a look at PCL for some pointers on how to start.
After you have the skeletal tracking done, you need to either create a body model and put the clothes on top of the model, or do a simple 2D painting of the clothes. This step is also custom made.
