Wii problem help?

To do this, yes it needs to be turned on, BUT you also need to have either a WiFi connection in your area or you need to have an adapter to hook up to the internet. For further information on the adapter, what ones, how many, and how much this will cost you, you should probably see your local GameStop, EBgames, or other "Video Game" providing company. They will have the adapter and if they don't they will tell you where you can get one.