$100+
Maybe $20. All the apps I really need and use are free, so I just wait for games to go on sale to pick them up.
Zero dollars. My iPod Touch is jailbroken so I play games by downloading cracked version of it.
I bought a bunch of games before I went over to Germany earlier this year. There was only one person I knew who could speak English, because we went to visit my girlfriend's family to hang out not to tour, so I went on a spree because I figured I would be very bored. However, all my purchases got me through.
You could have downloaded a few free dictionaries and German lessons. It would have been cheaper and more fun.