A:AnswerNo you do not need wifi. It's not a smart tv that you can hook up online. It's just a flat screen that has everything you need to plug in an antanea, cable box, composite for DVD player, and HDMI. Just no way to hook up to the internet.
A:AnswerYou can only stream signals to a smart TV, which this is not. However, you could add that ability through the separate purchase of a Fire TV Stick, Chromecast, Roku, etc.
A:AnswerYou would have to contact the store you are interested in shopping at or check the Best Buy website to get specific availability. There is no way anyone can answer that question, since no one "out here" has any way of knowing where you are shopping.