My objective is to have a room in which a person is doing some activities like bending, walking, etc. I am using MakeHuman to model the person. After that, in blender I import the model from make human. Now, I need some help on how to make an animation like walking. Does MakeHuman use armatures?
There are two different rig-types available rigify and mhx you need to enable the corresponding addon in the User Preferences.
MakeHuman rig (mhx)
The bones are organized in layers, with the addon enabled you get buttons to select them, in Pose Mode you can setup poses and keyframe them.
Same for rigify: