If you want to have multiple television screens in different rooms of your house, you don't need to have a receiver for each one. Some cable companies will charge for additional receiver boxes to service extra screens, but it's easy and cheap to run a number of screens off of the signal from one receiver box.
Measure the distance between your receiver and the extra televisions you plan to hook up. You're going to need to connect your additional screens to the receiver box by using coaxial cable. It's possible to buy wireless signal splitters but these seriously degrade the integrity of the signal and picture quality. You'll also need to plan where the wiring will go and how to conceal it.
Buy at an electrical store or online a signal splitter with a booster unit and adequate coaxial cable and connectors for the number of screens you plan to connect. You may need to buy a booster separately, but it is important to have because splitting your signal impacts picture quality. Splitters come with varying numbers of inputs and outputs to cater to the number of screens you want to connect.
Connect the coaxial cable from the "out" port of the receiver to the "in" port of the splitter, ensuring the connectors are fully inserted. You'll need to tighten these into place with the spanner depending upon the type of connectors you're using.
Connect lengths of coaxial cable from the outputs of the splitter and booster unit and run the cables to your additional screens.
Test all of the additional screens connected. Check the picture and sound quality and make sure all of your cable is correctly connected.
If you find that any one screen receives a poor signal, buy an additional booster unit and add it to your chain between you splitter and booster unit and the television in question
You will be unable to have different channels playing in different rooms of the house as the signal sent to all screens is from one receiver.