Awesome job! Nice work on the candlestick phone and the desk. You should really make a bigger on the inside metropolitan police box that is just a police station, I think that would be a fun concept.
I think those textures are pretty good! One thing you can do is try to add ambient occlusion to the texture, it pretty much textures all the spots that are close to another object or just a surface (You can also mix it with a noise texture to make it less uniform)