This is a most unusual and interesting structure. I would not have been sure it was a house from the picture. Pameladunson and I are in agreement that the strong visual difference between the rather utilitarian-looking "guard" at the roof and the more decorative fence/gate in front isn't visually pleasing. Both should be from the same architectural design family, although they need not be identical. The windows appear to have quite a bit of small architectural detail as best I can make out from the photo. The railing in front seems to have a scale that is better relative to those window details than does the "guard" at the roof, so I would probably opt for changing the roof "guard", not the railing in front. If do-able dollar-wise, It might be even better to remove both the roof "guard" and the railing/gate in front and design something new for these areas that is a good match with the most striking details elsewhere on the house.

In civil engineering this condition is known as efflorescence this condition occurs due to capillary action of water in brick in which water contains diffrent salts comes on surface through voids of brick and evaporates and salt rest on surface as shown in image this salts may be harmful or not this depends on type and chemistry of salts generally it is not harmful

If you will like to go little different than Indian / traditional one, mint green colour is in trend and goes well with brick colour walls. Looks good if you have white appliances, crockery and some other elements that are visible with it. (Sourced from google images) https://goo.gl/images/Wyu1kR

flooring to be Italian marble or huge tiles with similar look. I would suggest you to simply finish pure wood pillars ( do smooth Randa work and let the grains of wood speak for itself ) and do simple non coloured polish on it. thanks shradha shah beescheese design