If we were going for a still picture, our work up to this point would be enough, but we want Gus to move! The next step is to give him a skeleton, or Armature, which will move him. This is called the fine art of rigging.
The second step is to work with the UV layouts that you have created through the unwrap process. If you do add faces or subdivide existing faces when a model is already unwrapped, Blender will add those new faces for you. In this fashion, you can use the UV Texture image to guide additional geometry changes.
Creating a 3D character that is equipped to be animated is one of the most challenging things you can do in CG, and to make matters worse, it has always been equally challenging to find any comprehensive tutorials on the entire workflow. Well not any more!