I don't think the old version of TV will have the Spotify app. If it have Google on it, you can try to cast Spotify to TV. Or you put your downloaded Spotify files to your TV storage. It will be much easier to play Spotify directly from your TV. The Spotify downloader like DRmare Spotify to MP3 Converter will help you store Spotify as MP3 and let you transfer them to your TV device for playing.