Those are not "powered" speakers, so, like Enko says, you need some sort of A/V amp/receiver to drive them. And, of course you'll need to run wires to all the speakers.
For the best effect you need to have the speakers centered along the direct perpendicular axis of the TV, and you should be sitting along that axis as well. In your picture, that would be a line going from the TV, through the coffee table and in between the two couches. (from the TV to the lower right corner.)
Unless you can convince people to seriously re-arrange the room, you may as well just get a basic 2.1 system.
Last edited by Quaker; Aug 22, 2011 at 02:59 PM // 14:59..