Hello, everyone

I was surfing the internet for models and I found some models with the format .dae (Collada). I got one. I can import it with Blender ,but it is just the mesh without textures or materials or anything. I am not even sure about the bones (it says it is rigged in the site I got it from)


So, how to properly deal with a .dae model? How to get it in the end as a .mdl file with all the stuff existing (meshes, bones, ... etc.)?