HOW CAN I CONNECT MY DVD PLAYER THRU MY ROKU PREMIER PLUS BOX. WITH OR WITHOUT WIFI?
You don't. Then again, why would you?
The Roku has no input connections, but your TV should have lots, so you hook both of them to the TV, not to each other.
WOULD LIKE TO CONTROL WITH ONE REMOTE
@theob, the Roku remote can't control any other devices other than TVs. You would need a universal remote that supports all of your devices.