Hello. Guidance please?

We have an old house with thick walls so wifi strength through the house is very low. Not all rooms are on the same mains circuits. Wifi router is dual band. 

Am trying to see whether we can setup a system which gives us wifi in the rooms but also allows the tv a hardwire connection

1) If we get 2port tp link & plug into the living room

-Connect from router to tp-link

-connect from tp link to tv....

Would this provide the room with wifi & would the internet connection pass through the tplink to give the tv 5g? 

2) if the above works, which model do I need to buy to do this? 

Thanks