Wow, lots of questions there. Firstly, what sort of images are you looking to produce? Are they simply ones to display the furniture, or are they going to be a bit more fancy and artistic? Also what sort of location do you have to take the pictures in?
I'll try and answer these questions without this info, so they will probably be wrong.
1. Yes. It is a very capable camera that should do just fine.
2. If you have a tight space you will more than likely want a wide-angle lens. But this depends on where and what type of shots. If it is wide angle, the ever popular Sigma 10-20mm is a good choice, and not too expensive.
3. Your specific settings will be almost impossible for us to tell you on here. But expect to have to play with ISO if you are shooting in low light. However some artificial lighting and a good tripod will change all of this.
4. Main points to consider i'd say is lighting. Interiors are hard to shoot due to dull light, and possible light coming in from windows etc.
5. You may want a flash, possibly to place off the camera to light the subject from different angles.
6. A good sturdy tripod. There are too many to list. For a beginner price but sturdy construction look at Redsnapper tripods.
7. Settings can't be advised until we know what you are shooting etc etc etc.
All of the suggestions also depend on how far you want to take this. As going down this route can be limitlessly expensive, and time consuming, oh and addictive