1. Depends on the person. For me, no, and if so not very much.
2. Just depends each one. Sometimes it is a heavier flow, sometimes lighter.
3. 11 but it can happen pretty much any time around the preteen age (including any time from like, 8 to 16 I would say. If it is earlier or later than that, you might wanna see a doctor. The range where most girls start is 10-14).
4. Pads. Never used a tampon, mostly because my mom only gets me pads.
5. Not really, though it depends on the one you get.