Can I connect my wii you to my laptop that i watch the game on the laptop and play with the laptop?
No
You need a capture card. With the help of this you can then play the image of the Wii U on the laptop. To use the Wii U you still need the controller of the Wii U.
No, both are an exit, you need an exit and an entrance.
Inputs can be found on the TV or on monitors / screens