Open itunes. If you are connected to the internet itunes will automatically connect to the itunes store.
Here is the Link which will help you to Browse iTunes Store: http://www.technobuzz.net/browse-itunes-store-without-installing-itunes/
Open iTunes on your computer and click on iTunes store
Yes. I live in America and I get on itunes all the time, so I assume that America has an itunes store.
The App Store is indeed part of the iTunes store. In iTunes on the computer, you can find the app store by simply going into iTunes and then clicking the link to Apps which is located at the top of the iTunes store window next to music and videos. On the iPhone or iPod touch, the app store has its own separate button on the springboard so that it is independent of the music/video content of the iTunes button.
Connect to the iTunes Store and a link to the App Store can be found centre top of the Store's window.
Register an account with the iTunes store.
No you can't store game memory on itunes, only songs.
At the bottom of the iTunes store's home page is a drop down menu from which you can select your local store.
Accually, im pretty sure that itunes cards ARE app store cards. itunes cards can purchase anything off of itunes, including the app store.
Yes
No, you cannot.