A:AnswerYes you can! If you have an iPhone it can also take calls when the iPad is near (phone, FaceTime and iMessage). Cellular service is not needed to FaceTime, as long as there is a valid Apple ID linked + WiFi you’re good to go,
A:AnswerYes, they will scrub it and give you cash value on a Best Buy gift card. I purchased a hard bound cover case and a lifetime glass protector. Totaled was $$90.00
A:AnswerYes, this iPad does use WiFi connectivity to connect to the internet. You would have to have some sort of internet connection already established in your home/office to use the functions over the internet.