The chair is fairly easy. The seat and legs and other members are cylinders. The back is just two cv curves with the face of two cylinders extruded along the curves.

The typewriter is a bit of a modeling project in itself as there are clearly lots of elements to it visible in the scene. I would start by searching google images for similar typewriter references of the era and model it out.

I can't offer more just now as I in the middle of upgrading my modeling machine from vista to windows 7. I can check again tomorrow with maybe to screen shots to help you out.