Rowe Furniture has very clean line sofas that I think would be an appropriate scale for this room. LOVE the red feature wall. You do need to bring the red into the room but knowing how you want the room to feel can help determine a color palette. If you want the room to have energy and "pop", try a split-complementary or triadic color scheme. If you want it to be more relaxed and harmonious, I would suggest an analogous color scheme.

Susan, I find that people often make their coffee tables too low and too small. Measure the height of your sofa cushion and pick a coffee table that is a similar height. Also, in the layout you posted above the room would look better with a larger coffee table. Even as long as your sofa, or close to it. Let me know if you need one custom built, it easier to get the right thing for your room than you may think. Here is my etsy store if you end up needing one custom built. www.etsy.com/shop/MetalTreeFurniture

It's difficult to get on the bed and off it, in a platform bed. Also if you wake up in the night without lights chances are you may hit the platform when getting off or on.

Not a very good option for indian family lifestyle at least. But again its a subjective matter, depends on the choices. White is best when it is a Pure 'Minimal' Design. British Architect John Pawson is one i find best in my knowledge till now who is doing minimal architecture in its purest form. And i don't see any in india who is doing such work.