So i was thinking about buying a TPLINK AV500 Powerline adapter but it has no Wifi ability , Is the wifi on a powerline adapter important ? Since i don't want any wires running trough my house I need to know.
Powerline will transfer your Internet over your electricity cables.
What you CAN do is buy one with Wifi capability's.
The internet will go form powerline A to B and B will behave as an access point.