Does the TV have HDMI? If yes it's much easier to use a Firestick, Roku or another streaming device instead of having the phone tied up.
If you want to connect the phone to the TV to use as a screen, you will need to either use an MHL cable (supported devices are here (http
/www.mhltech.org/devices.aspx) or use screen casting for which it sounds like you will need a Chromecast.