How to import fbx with texture if the fbx and texture are separated

I am having a simple question as a beginner. Few minutes ago I downloaded a city model in fbx form but the files were in a folder. The fbx itself was purely white and all textures were in the folder, not implemented on the fbx. So how do I import the fbx to unreal engine with textures on it? Here are some screenshots. The first one is what it was supposed to be.