Hi,To add one of the pre-defined Motion Clips, go to Script and then switch to Timeline. From the Motion Clip tab select the facial animation you want to apply.
Drag the required clip to the Motion Clip line on the timeline. You can't use the Apply button with motion clips. You can then extend the motion clip at its end by dragging it to the desired length.
For Puppeteering I would suggest you follow the puppeteering tutorial which for convenience I have included below. This should answer your questions I hope.