There will also be a trestle table (I need to get some wood before I can start on this), stool, shelves, food and fireplace. All of this I intend to make myself, so I will update you with my progress.
On the room box construction front, I found this great website which gives you step by step instructions on how to put one together - Plan for a Dollhouse Room Box. I've measured and cut my pieces, I just need to sand them down and fit them together. The tutorial suggests corner clamps to hold it together while the glue dries, so I need to try and borrow some before I can stick it all together.