so that it will acually be fun
No you don't need to divide to sell video games.
no.
As of now there are no achievements in Indie games. Currently only Xbox Live Arcade Games and retail games have achievements. There is always the possibility of Microsoft adding support for Indie game achievements in the future. As of now, no achievements there.
You have to be in College so you can make video games.
Yes, you do get achievements! These achievements can be found in games that you play, online, and offline. These achievements can be viewed in your achievements section.
You may need to be more specific, but to answer your question there were various electronic devices with displays that people made games for. These were considered some of the first video games.
First of all, you need to have knowledge about creating video games. This can be achieved through attending schools that teach you how to make video games.
No you cant get achievements for the original xbox games, sorry.
you need to practice, that's the only way
It depends. Some Xbox games need some sort of connection or something but some Xbox games can be played on Xbox360 but you dont get achievements.
To get into making games (video) you would need to take computer classes at your local college.
Xbox 360 achievements and Playfire are two such examples.