One option, I would get a very large rug so that all the chair legs and at least one corner of the sofa is on the rug. I think I would also bring the table set away from the window a little more. I think there is enough space to place the two-seater opposite the table in front of the window. or bring the table forward toward the kitchen ....... With the sofa centered to the large window. They probably will not be opposite each other, but at an angle which is still ok. They might seem more functional for the table set to be closer to the kitchen. Another option is two rugs in wide runners. Creating a walkway through the center of the room. Still thinking the sofa center of the right window. Just some ideas :-)

I am not a designer. Not every house has to have a hallway but I wonder about efficiency problem: people crossing into dining table/chairs to get beyond to another room. There just has to be enough room I guess.

This reminds me of my kitchen in Hyderbad, India. As others said, go with open shelves. Both wood (contrast) and stainless (brightness) would work well for upper shelves. I would also do shelves in the lower cabinets. If you want to minimize cleaning, add heavy, easily washable curtains to the lower shelves. You can add some battery operated lighting so you can see into those darker spaces. As for the walls, I would use a white subway tile and go as high on the wall as you can afford. The glaze will reflect more light and the surface will be relatively able to keep clean. Paint the other walls in a high-quality white paint (use a ceramic one if you can find it, as they are a lot more durable). Keep the appliances to a minimum. Kitchen gadgets might be handy, but lost of them will make the space seem small. For the ones you do buy, go with white or stainless steel. Finally, hang pots, pans and utensils on the walls to free shelf space and get them off the counter. Make sure what you use frequently is within easy reach, while "occasional" tools can be higher up, where you might need a stool to reach them.

normally the breakfast counter height varies from 36" to 42" if you want it to be perfect height select the stools for the counter first then check the height of the stool and add 12" to 15' in the height. distance between the stool seat and table top should be 12" to 15" max...