I wouldn't give time-outs for things like tattling as it is annoying, but not serious compared to hitting, etc. I would tend to ignore attention seeking as much as possible unless it is dangerous or harmful to others. As for the question asking, that is pretty normal for a 3 year old...my 3 year oldasks a lot of questions too and if I can't answer I will tell him I am busy right now and will answer later, but when I can, I simply answer them because he actually just wants to know; they sound like ridiculous questions, but for him they are real questions he has (the why is extremely common at this age).