creating enemies

I created 3d model and imported it into unity3d and I added a texture to the body but the skin of my model does not look like human skin so the question is how to make the model skin looks like human’s skin and also how to add cloths to the model ?

look good you have assigned body parts with textures, but you can download a model by asset store( this in window / asset store )
or in this page: http://tf3dm.com/
(download it in fbx or obj format)
if it doesn’t help you put again your ask but more specific.