My bike just came in the mail today and i was working on assembling the basic things. I put in the handlebars, saddle, and front wheel. I haven't screwed with the brakes or anything yet, because I don't really know what I'm doing. Anyways, I kind of just pushed the bike around a bit and I think it in fixed gear right now. I heard these bikes can be easily changed from fixed gear to single speed so it can cruise, which is what I want. I heard someone about a flip flop hub, what the hell is that, and how do I use it?

Also, I thought the bike had a quick release front wheel and saddle, but its not that way either. Is there some part I must add or something? Do I have to buy it?

Sorry for being such a bike newb, but all your answers are greatly appreciated.