I think you can start by de cluttering. There's too much going on. If you want to keep the bedspread, I would pull some colors from that. :) Teals, browns, whites. It would make a pretty room.

Our bathroom is the smallest room in our house. Width = 5 feet and depth = 8 feet. This is this the size of our bathroom. What does this size give us ? A step over bathtub with shower, A small vanity with matching small medicine cab, a toilet (of course), shelves over the toilet, a floor to ceiling (skinny width) closet to house things like towels.

plz advice how much smaller modular kitchen baskets should I buy to fit in the built concrete and marble shelved cabinets

Plan the bed on the T.V. wall. You can start from the window side. The sequence will be first the dressing mirror with 2' wide dressing unit then 6' wide bed next 2' wide night stand. By providing the dressing near the widow, you'll have the advantage of natural light. On the opposite wall make a drawer chest or the study beneath the window next is wardrobe. Plan the wardrobe in such a way that you can provide the T.V. unit centering the bed. This way you need not do any structural changes and it fulfills the requirements also. Never compromise with the wardrobe depth. You must provide 24" depth for a perfect wardrobe.