Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
All Roku's are HDMI only (except for some Express+ which have a composite output.) Your receiver has no HDMI, and no current Roku has optical or coaxial audio. If the TV has HDMI, you can at least use it there. If it has an output that you can feed the receiver, you may at least get stereo. Otherwise, you would need an external adapter to create an optical/coaxial audio, and continue the video to your TV.