I'm stuck on the 3rd question asking how many candies does the candiest person in the world possess?
It is the number of candies you have at the moment, but if that's changing too quickly to enter, go to the lollipop farm and develop it to the point where you can have alligators. Get enough alligators to consume candy faster than you gain it, then eat all your candy. It'll stay at 0 and then you can put that as your answer.
(Note, you can turn off feeding the alligators to build up candy stores again.)