1) Well, last year we had 1700 people.
People say that with all the advertising the Street Team is doing, we'll have even more.
2) Last year I went and I was 14. :] People of all ages are welcome, of course. Although, there are curfew restrictions for those under 18, along with hentai/yuri/yaoi panels that may require you to be 18.
3) Yes! Going any day will be worth it. Although, you should try and stay the whole weekend to get the whole experience.
4) You just walk in. There will be a program book handed to you inside your goodie bog (or aronud the con, I'd hope...). Go to anything that seems mildly intresting, and I'd roccomend the AMV contest, Cosplay Contest/Masqurade, The Dance, and if you're into it, all of the gaming going on the whole convention.
5) Last year the Con started at about 7am and ended at Midnight. All minors gotta be in their rooms at 12. xD (Don't get stuck in a huge line to the elevators! ohgod, the crazyness of last year...) You can staty out all night if you like... But I wouldn't advise it. I think that if you stayed up the holetime, you'd pass out.
6) Don't worry. Just have fun with it! The con is so much more exciteing when you're in cosplay (People constantly staring at you. It's the greatest...)
7) XDD! Now, you surely can't worry about that. Kumoricon has it's very own
Pocky Club who deliver pocky to congoers (More information if you want it. n_n). I bet you'll find out that people are willing to share pocky with you, if not, find me and I will. xD Oh, and the Dealers Room has Strawberry Chunk, usually for 2.50? 1 buck! ^_^
Hehe, I'm Neko-chan. Nice to meet you! I hope that you have lots of fun at Kumoricon. It'll be my second time going and I ca'nt wait.... 60 days or so left!!!