Need more info. You are asking for old pics - so what epoch are you trying to echo? There are open plan partitions and there are closed plan? Office design really took off in the 1960s (watch Mad Men) and then developed and evolved from then...

Start by looking at photos on Houzz, and creating ideabooks of what you like, This will help you focus on ideas. Once you are closer, start to plot down spacing and then we can start to better assist you

two basic issues your room floor is dull is that floor to floor carpet if yes then add a a smaller area rug under your table to get splash of colour, alternatively if you dont want to do that then add some colorful wallpaper behind the sofa. Where you have the table lamp add something taller like a modern floor lamp or a tall spread out palm plant. Take the table lamp and add to a side table if you have one. The second biggest issue is that you have a lovely modern sectional sofa and then you have paired it with a very traditional and very high coffee table that looks like it has marble inlay work done (cant make out clearly). This is not a good pairing. The coffee table is the right size but get something modern and a lot lower, a general guide to this would be one inch to 2 inches lower than the seating height of the sofa. As someone else mentioned an Ottoman that can serve as a coffee table in an alternate colour will also work. Paintings and wall art is something you can experiment with but unless you do something about the coffee table the room will continue to look odd in my opinion. Also some more shots of the room will help us get perspective.

Hello Vivek , The House has some really Interesting Projections and setbacks. There are multiple options ,house can be rendered into a appealing building. 01. Boundary Wall can be bought to one level with MS grill work , Plastered and finished with texture paint/stone masonary work/dry cladding. with exterior lighting and landscape ( planter box/hedges) 02.Aluminum Window work can be removed , replace it with Glazing work with thick border( Only at floor level 01). 03. Interestingly 2nd floor can have open sitouts , balconies with greenscape and jaali work. 04. Third floor can be simply plastered and finished with Texture paint or cladding work. 05. At the 4th level Large MS framed canopy can be projected. which will elevate your house and entitled all the floors as one unit. This house really needs to be designed and documented with the professional. There is a lot scope on the design part.