Most cheap AV receivers would power these. Look for a used AV receiver that can do 50w per channel in stereo. They're pretty common some people are basically giving them away. As for speaker wire, as long as the run isn't too long these would be fine with 20 gauge copper wire but I'd go a bit larger if you're not sure you're getting actual copper wire. 18 gauge would be a safe bet.
Edit: You will also most likely need and HDMI or optical cable to connect the receiver to the TV.
Edit 2: I'm assuming your TV has these ports but in any case, an AV Receiver will pretty much have any input you might need.