In response to the first question I would have to second dot in saying “no”; we do not already live in anarchy. While we can make choices, they are made within a framework that not only enforces consequences for those choices, but also informs them. That framework is society, the state, capitalism, woven together into something that is definitely not anarchy.
I think the question you posed in some ways is similar to asking about choice; when is it our own, when is it the same as freedom, what does it mean....I think choice might be posed as freedom in our current context because it is the only thing that comes close. Maybe choice, or at least the choice between limited options with imposed and arbitrary consequences, is a poor stand in for freedom (anarchy) and serves to placate us more than be an interesting option.
As for the second question, it seems that your clarifying questions implied that you wonder how many people or how much space is required for anarchy. I don’t know the answer to that question. I think it is more about outside influence. 20 people living in the middle of nature with no contact with or connection to society might be anarchy while those same 20 people living in an apartment complex in a city would not be. The other part of your question might be rephrased as “how concerned would people living in anarchy have to be with people not living in anarchy?”. I don’t think there is any obligation to rescue other people living under a state infrastructure provided there was no influence or power their position has on you, but ultimately that gets pretty speculative.