Two lights are better, but if you use thee pendants, then position the two stools should be in the middle of the center and end lights.Although they will look very huge. Pictures would help.

I love sky blue and want to paint my room, so i think it depends upon choice and likeness

That's a fabulous idea. I don't like that front board but it's lacquered to coordinate with the cupboards, so ot couldn't be painted . I could keep the stools and improve the hated kickboard. That would be a double win. Although a lower back would be nice. I kind of like those white lattice designer ones, would they be too busy?

I would wait for the rug, until you have the shutters up and your furniture placed..it may take on a character of its own and you'll want to compliment. My first thought though was to coordinate with your kitchen and incorporate some black, with a black/beige stripped rug, which would be fun with the wallpaper and perhaps paint your chairs black, add the shutters and you could paint the window trim black and add a large black chandelier.