It depends what the power rating of the appliance is. A 500 watt microwave will use half a kilowatt
Check the power rating of the TV, and multiply by how many hours you used it for. Say if it uses
Watts does not have a time component to it; so you should have asked, "How many kilowatt-hours
Varies dependent on brand and model. For a specific one, go to the website for the manufacturer.