Try re-installing the game. If you got the game from a torrent, it could be a bad file, and i suggest buying a CD.
Nothing, you can just keep playing until you are bored.
you either finish unfinished missions or talk to someone in the square
you have to finish some missions, or you can use cheats to finish missions esier'
No. But there is a mission 11 coming out soon so watch the missions!!
do all the missions
easy
finish your missions
You Finish the Dark Brotherhoods missions when the leader sets you up and she gets killed and then you become the leader and recruit new members
When you complete Story mode, Or I think you finish story mode, then all "s" rank missions. When you finish Kakashi Gaiden, you unlock Temari.
There are no more missions, but you can buy Club Penguin Elite Force for your DS and you can play more missions there.
Finish all the missions (noob no offence)
No. It stinks doesn't it. ;(