The router has an integrated switch. The switch is basically a router without any of the internet connection/sharing functionality.
As for wiring and such.... do what I did. When I moved in here, I went to home depot, got a bunch of the plugs, wall jacks, and face plates, a crimping tool, and 200ft of Cat 5e ethernet cable (Cat6 is not necessary or worth the expense IMO). Now... I had a crawlspace to make it easier on me, every room I wanted wired had access to the crawlspace in one way or another... but doing it yourself with the crimping tool and such is not only easy (with Google to figure out which wire goes where
), but it saves money in the end and the crimping tool is useful for making your own patch cables with the leftovers or repairing old cables with broken ends.