yes all macbooks have wifi you can read about it on this page: http://www.apple.com/macbook/features.html
Yes, all new MacBook Pros come with a built in AirPort Extreme wi-fi card with 802.11n capabilities.
all of them need wi fi if there free
Not all apps require Wi-Fi. Most gaming apps do not require Wi-Fi to play.
Do I have Wi Fi?
I think all you have to do is log on to the wi-fi.
Yes they all canreceive wi-fi. But only if there is a wifi signal available
If there are no Wi-Fi routers around, then you cannot get Wi-Fi.
wi-fi
Just go to settings on your ipod i do that all the time
Yes, all 3DS models are wi-fi compatible. They can be connected to a wi-fi hotspot.
Yes, they have either wi-fi, or wi-fi and 3g.
Yes, wii's do have wi-fi.