glowing texture effect like a TV monitor

There are a couple things that might work. If you haven't done so, use an image as a material on the TV screen itself. I suspect he brigher the image the better. Then, under the Emission setting for that material, described in other comments, click the Color box, and instead of a color, chose image.  Select the same image you're using on the TV itself at the same size parameters.  This will immediately brighten up the display. 

You might also try adding an Area light from the left Starter menu. Position the light just in front of the TVs display and orient it light so it shines away from the screen. The light works better when it can reflect off object(s) in close proximity.

The glow effect may also be something you add in Photoshop. You can render the stage to a Photoshop file and from there add a tranlucent and feathered layer to simulate the glow. 

With the object selected, look in the Properties panel and choose Material from the available selections (Transform, Object, Material), Scroll down until you find the section called "Emission" and drag the slider all the way to the right. You will see the object "glow" and can adjust the level of brightness you need using the slider or even by typing the value directly into the "Emission intensity" field.

To help explore the different options in the Material section, use the Help link. There is a lot to explore, so have fun!