How To Use.

Extract the "Toon Nature Set.zip" to the file location you want.

Every model is placed individually on its own scene, without cameras, lights or modifiers.
All files properly named so you easily find them and append. Folder structure is pretty straight forward.
To Append the objects into a Blender Scene go to File>Append and navigate to the objects folder within the blend file. Select and click Append.
If you have problem with missing textures, go to File/External Data/Find Missing Files and choose textures directory from the extract folder.

Many of the models have colored materials, without texture maps. To change the appearance simply edit the base diffuse or glossy. And some of them include various styles with different textures (2K .png). You may change it under the material tab of the model.