The Roku must be connected to the internet through a router, either wireless or by an Ethernet cable (requires the Roku2 XS model). You will also need a composite connection to your older TV (red, white and yellow connections like a DVD player).
No, I don't work for Roku.
OTA Antenna, "Netflix Player" N1000X, XDS 2100X (premature death by lightning)
Roku2 XD 3050X, Roku2 XS 3100R