I don't understand why this comment is the top one right now. Has this been people's experience? I have asked all these questions (pretty much) and have gotten almost everything answered. Answers regarding revenues where a little obfuscate or a range was given.
Some startups are reluctant to tell you how many shares are outstanding in the company (happened to my wife). They say you get 100,000 options, but will not tell you the info needed to properly estimate the potential value of those options. In my wife's case, they just said to trust them that it was a valuable offer.
Not sure how this works elsewhere, but in the UK you can find public documents submitted by companies (including private ones) on the Companies House website and find out how many shares are outstanding (as well as some basic information about current shareholders).
In the US, corporations are filed with one of the 50 states. The information that becomes public record varies by state, but you can always get the registered agent and some basic information about it (date it was created, name, etc). Sometimes that includes share counts, sometimes it doesn't. You can also generally pay a nominal fee (tens of dollars) to get an official copy of filing documents.
Some people feel cagey about saying how many have been issued (or even what stakes the investors have), but anyone that doesn’t share authorized is either confused or deceptive.
I would say though, don’t assume malice! Some people really believe that they’re supposed to keep this secret to protect their investor info or something.