You don’t need a Plex Pass to run your Plex Media Server – it’s just one of the options / dependencies to stream media while outside your home network.
What particular app did you install on your TV that wasn’t able to see those libraries?
The “new experience” Plex apps used to drop music and photo libraries for their dedicated apps (Plexamp for music/audio, Plex Photo for photos). Though, they have since reverted that and those library types should be available on Roku boxes / TVs.
If you’re on an Amazon Fire TV 4K Stick with their “Vega OS” platform, that can provide some similar limitations:
Xumo X1 smart tvs only allow apps of streaming providers, but not to access self-hosted content. As such, Plex is only allowed to offer an app giving access to their online media source (video on demand, live-tv streaming) – but not to any of your personal libraries.
https://support.plex.tv/articles/plex-for-x1-overview/
