Well, everyone is different. Some people actually don't bleed and some people will experience bleeding. There is also a chance that you will experience a little discomfort but once again everyone is different. And if you do bleed it should only, I believe anyway, last for a little bit so you should not need a pad. As for how much it bleeds, I am not sure. I would imagine not very much.
Hope this helps :),
-Norden77