Here is what I can share with you based on a quick skim through the photos.
1. Tripod. Get one that's pretty tall. Shooting from above tends to create more spatial shots. This is desired for real estate. I usually shoot from around 6' tall for establishing shots. So in short - shoot from high above down so that the top of the frame is just hitting the ceiling.
2. As mentioned above by Tim, White Balance. Keeping it consistent is one thing, but another tip is that people tend to respond better (emotionally) to warm tones. I usually do this in PP.
3. Shoot from corners out into the room. Angles are more interesting than straight on lines.
That's it in short. If you need more help, ask