I want to paint my living room this color (or something similar, maybe a little lighter or brighter):

My question is, do I go ahead and paint the entry way the same color or leave it how it is right now and just paint up to the wall where the sectional is. Also, should I paint the little nook by the fireplace that leads to the bedroom? I feel like I need to paint the whole house with an open floor plan!

I also want to paint my kitchen/dining nook. Should I paint it the same color or a different color to define the space?

Here's the layout of the living room and kitchen.

I need advice! Thank you!