If you need a site to help with learning programming, Stackoverflow is the largest and best place by far.
The first guy was saying that you don't need anything else other than Stackoverflow (which is true) and he was also implying that you should already know about this site by now (because it's insanely famous to all programmers).
The second guy was warning you that they don't like it when people rock up and expect people to tell them everything and answer all their questions without putting in the tiniest bit of research first (likely because that seems to be what you're doing here, because even the most basic google search for "ask programming questions" would bring up Stack no doubt straight away).