Once you have created a biped, use the Biped controls on the Motion panel to animate the biped, load and save Biped files, and fit the biped to a mesh representing your character.
Create a biped if one does not exist, and select any part of the biped to see the controls on the Motion panel.
Depending on the active mode, the Motion panel contains the following rollouts:
Assign Controller Rollout (character studio)