i was wondering what kind of a plant?

That depends on where you live and what direction your windows face. And also whether you tend to have good luck, or not, with houseplants : ) .

But in general, something tall.

on the other site is the fireplace and the kitchen

I asked what's on the other side, because while it's a bit difficult to gauge the dimensions of your room from the photo, it does seem that you could perhaps move the sofa closer to the television. That might make for better TV viewing and also make the room seem less empty.

Table with chairs, left of TV. Large tree/plant in right corner. Console under TV (for storage and visual weight). Agree with larger rug.

What a lovely room! I would get TV console and rug., may be poufs or chair?

Celerygirl thats amazing. Thank you so much for the photos. That was really helpffull. What programm is that? Is it friendly for an amateur like me?