How to view a model correctly in Blender?

[xSuperMario64x]

So I use Blender v2.78 to view models downloaded from the model's resource. However, I cannot figure out how to properly view the model so that it looks like it should when rendered. I usually just open the .dae file and then import it to view the model, but the textures are missing. Most of the time I cannot even get the textures onto the model (the program won't let me link/append the textures).

Is there a specific way to open these models?

Here's what the model looks like when I render it:



As you can see, the textures are missing.