I agree with painting the doors. All my interior doors are a deep charcoal grey. You'd be surprised how expensive it makes them look. That aside I would start with a rug. A huge rug. Something chic with a lot of color. Then add love seats in white, colorful pillows, and chairs in fabrics that pickup the colors in your rug. No BIG furniture. Just because you have a big room doesn't mean you need to stick a brown sectional in it. A couple fancy topiary would look great under those windows. And dont forget lighting.

Looks like saltpetre which is leaching through the brick. You may hae waterproofed the outside but what about water leaching from the roof. Water will find a way.... Here is an interesting link... http://www.arcane-industries.co.uk/l1/p281-dampness-saltpetre-condensation.html

You need texture. Lots of white pillows with different weaves. A bed throw in a weave or unusual white fabric. White textured rug. Can the bed be re-upholstered? Can the handles on the wardrobes be changed?

Hello Sajithra, This appears to be smeared mortar. Thanks, Nitin CORNERSTONE DESIGNS Bangalore