I like the old distressed doors with the poles between the 2 that you have pictured. There are a lot of ideas, but I'm not sure if you want modern or what? In any case, you could modernize any of these ideas...including using new doors with cool bright shiny colors. Here is an idea using chairs. In addition, you could use the seats for hats or other accessories. Trunks and dressers are good things as well for diplaying in an open drawer and utilizing the top. You could use wardrobes and space them out and use a wooden dowel between them for hanging clothing. What kindof budget are you thinking?

You do not mention whether you wooden wall will be painted or stained wood. Either way, there paint products you can use to properly seal and protect the wood either way. You should visit your local paint store and tell them what you are trying to do and see what products they recommend.

What do you need to store in the kitchen proper? You already have crockery storage and food storage elsewhere. Just tally what you actually need to store and provide space for that. You may not need all built-in cabinets; shelves, hooks, or pegboards may do as well. And yes, the utility room is very tight....it look like just a 24 in (600 mm) wide passage? I'd scrap the sink rather than squeeze it in so tight. Do you really need separate spaces for utility, kitchen and store? If you combined these all and planned them carefully, you could have a large, very functional kitchen, at least by US standards. (Not being familiar with exact kitchen norms in India, I can't fully comment on the tradeoffs.)

Do they have to be paint buckets? I would think they would not be good for gardening? Maybe others will know more about that. But in the U.S. you can get 5 gallon buckets from some local businesses like bakeries, food store chains, places like those that regularly use items they get in the buckets. For instance a bakery usually gets stuff in 5 gallon buckets and often has to throw them into a dumpster as they can only save so many. Some businesses now sell them for a small fee, maybe 1 dollar U.S. each and some just give them away. I think the cost of shipping them to India would be more than the cost of buying them. You could try setting up a fund on Kiva.org and possibly get enough donations to purchase food grade buckets instead of using ones from paint. Good luck with this project and please update us as to your progress.