3D animation and a little 3D modeling

I have 5 snowman models from the Unity Asset store - [login to view URL] The models in fbx format. You need to create two groups with destruction of the models, create a humanoid skeleton and bind bones to group of models, future project should be in Blender 3D. Create 4 animations: idle, run, die & attack. More about the groups of models: i need two groups of destroyed snowmen, the first is just destruction into 3 uneven balls (each snowball) and sticks with attributes, and the second level is a little more detailed (a snowball is destroyed into 5-7 parts) But all these groups must be associated with the skeleton, otherwise it will not work to replace the snowman model with the destruction model.