I would answer all of those questions. I have, in fact, answered versions of many of them in interviews. I've noticed candidates who have had a bad experience

I would answer all of those questions. I have, in fact, answered versions of many of them in interviews. I've noticed candidates who have had a bad experience at a previous startup often try to find a circumspect way to ask if we're profitable and if we're going to run out of money. Those are good and fair questions that I'm happy to answer. I'm sure some companies would demure on some of these if the answers are uncomfortable. I hope not many would laugh! For an engineering position I suggest candidates also ask if they can review some of the code they'd be working on like a recent pull request.