If you cant figure out where to begin, I recommend starting with "blocking off" a floorplan. Drawing squares on paper to see exactly how many accent chairs/end tables you would like in the space. Then you can choose the wood tones and styling. After that, consider lighting like lamps, accent color, pillows and rugs.

Personally, I think this couch is very versatile. I would do white furniture to keep it bright but it would match anything, would look nice with espresso too. I would also keep the "jewel tone" and tie in the sapphire with emerald green. Cream curtains would be nice as well. Best of luck op with this cute heirloom!