To open a blender file

just click on "Cycles.blend" or "Eevee.blend"

To open fbx

1.Go to file>Import

2. Select "FBX (.fbx)"

3.go to your download folder and select .fbr

To open fbx

1.Go to file>Import

2. Select "Wavefront (.obj)"

3.go to your download folder and select .obj

The textures are on "textures.zip"

To open it you have to click with right button of your mouse and select "extract to textures\" or "extract here"