I have used blender for years (modeling/texturing), I know how to rig, but I never needed to animate anything. In the past I sometimes move bones (mostly for fun) but I don't know how to deal if I want to make different animations with the same character.
as first task, I want to make my character walking, running and waving.
(I'm using blender 2.71 on linux)
You use the action editor (a sub part of the dopesheet) to create multiple actions. An object can have one action associated with it at a time so remember to add a fake user to keep other actions.
Once you have setup multiple actions you use the NLA editor to combine and repeat a mixture of actions for the final animation.
It is also possible to use multiple blend files with linked copies of your character that each contain one animation for a shot. After each shot is rendered out you edit them together into the final video.
The Makehuman project exports to Collada and to Blender exchange (mhx). It can also rig your models for Rigify in Blender. Making any exported Makehuman model move convincingly (walk, run, etc.) in blender is as simple as downloading a BVH motion capture file and associating it with the rig using the Motion Capture Addon and MakeWalk.
