Home Photo Studio Set-up?

I am trying to set up a home photo studio to do full length portraits,however Im lost as far as lighting. My subjects are often moving around and I want to be able to stop motion. But most of the time there isn't enough light. To compensate I have to slow up the shutter (aperture is already wide open) and then I get a bright picture with blur, when I don't want the blur! I want nice bright sharp pictures, where motion is stopped. I am working with a a white paper background and would also like to eliminate shadows. Examples of what I am trying to achieve can be found here: http://www.omgphotography.com/gallery.php?cat=everything What do I need? not concerned with $ yet, I just would like to know what would be the right equipment? flash lighting? steady light source? how many? where are they pointing? Any advice that will help. Ive experimented so much and not achieved what I wanted, I am finally breaking down and asking, I am a clean slate...teach me...thank you to whoever answers!