Your TCL Google TV has built-in feature called Talkback which assists users to in navigating the on-screen menus. Once this text-to-speech (TTS) feature is activated, Talkback will read out text, menu items and other on-screen items. Below are the step-by-step instructions to enable or disable this feature:

1. Press Home button on your remote to open the main screen.
2. Select Settings at the top right of the screen and press OK.
3. Scroll down to select Accessibility and press OK.
4. Scroll down to select TalkBack and press OK.
5. Select Enable and press OK to turn it on or off.

Note: To set up Accessibility Shortcuts, allowing you to access features like TalkBack with one click of a button, please read this article: How to Enable Accessibility Shortcuts