A:AnswerYes Playstation Plus is the membership required to play online.
only for multiplayer the remaining stuff are accessible without that, like Netflix or system or games updates.
A:AnswerThe fact that it's limited edition means they only made a limited amount of them. So if you didn't buy them when available you're most likely out of luck.
A:AnswerThe headphones included do have a microphone built in but its not very good. They are like the ones that come with new iPhone's but cheaper. If you want to hear things well and have people understand you I would invest in a pair of nicer headphones.
