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yes it does and yes you can use your wifi at your home
Yes it can use wifi and there is even a way for it to be a wifi hot spot.
Wifi password recovery is an app that you can use in recovering your wifi password.
Yes, you can use the Pou when you do not have wifi.
Yes it is possible to use a Netgear wifi router on a smartphone. Smartphones have a wifi receiver that it can be used for wifi repeating or wifi giving.
non-denomintion
WiFi usb adapter is a WiFi card.
public wifi...Mcdonalds
NO
A wifi phone is just a phone that can use wifi. You would connect it to a wifi network to get a better signal for faster web browsing than a cell tower.