That tv corner is awkward. Can you get high, corner piece, that is light and airy, and more contemporary. Something you can put the tv on, and the tv could have a cabinet underneath, and maybe a couple of shelves above. I do think that it should white, and modern . The corner looks bottom heavy, and white or some other light color that is close to the wall color would look much better. The windows look nice and clean, and let the natural light in. At most i might put a mesh shade in the a color close to the wall color, or something in a natural bamboo look. I can't see what is on the leather chairs, but they could use a pillow, maybe in bright mongolian lamb, ( they have many on this website for sale ), but I would keep the backgrounds of the room, which means basically, the floor and walls ( which forms an envelope ), and bring in color on the pillows, or throw, and art work that is either black and white photography, or high color art work, that shows up somewhat solid. Nothing faded, or feminine. The room has good bones, and it needs strength.

Do you own or is this a rental? The pix look a little stretched like realty ones. Since there is a rad between the doors, forget putting TV there. I'd keep the dining close to the kitchen and put the sitting/TV area to focus on the long wall. Start with the fun project of finding a knockout chandelier to hang from that pretty ceiling. Is there a fridge under the microwave? I see only one wall outlet behind the door and one above the counter, so you'll have to use extension cords and cord covers along the baseboards to have enough lighting here. Consider floating your sofa facing the long wall and TV. Then use a drop leaf table behind it for dining. You'll be able to open it all the way for entertaining. Anchor your seating area with a rug 2-3 feet wider than your sofa.

I would take some painters tape and square off the room. The bay window side and the alcove side and use the square area for furniture placement. I would hold off on buying a sectional until you are absolutely certain it will work. Most often a sofa and chairs is a better purchase

Candid! The first thing I saw in both rooms were the window treatments. The living room valances, although formal in design, are a dated look even for kitchens. The dining room drapes and swag should be framing the stage in a theater; they're just too heavy and dark. The red art in the dining room and the blue art in the living room are "off" elements in contrast to you furniture. The red ones might work in your kitchen, and the blue could theme another space. Dried floral arrangements and sticks as decor faded a long time ago. The living room rug should be as large as the one in the dining room. What to do... Here's a favorite house of mine and you have the furniture to pull off a similar look if you just simplify and get a larger rug and some side tables and a coffee table that are in scale with your other pieces. Click through the link with the photo to see other rooms in this lovely home. Brighten up your space by painting both rooms as below (believed to be Navajo White walls and White Dove Trim.) Consider wainscot for the dining room and a new chandelier. Updated window treatments that match in both rooms, larger rugs and less clutter would improve things. If you do paint, then removing all the tchotkes will happen anyway. Pack them up and only put them back judiciously.