It sounds like you need to learn more about your new iMac. Installing programs on a Mac is much easier than a PC but it is different. I suggest try getting help from a friend who is experienced with a Mac or perhaps buy a book that gives the basics.

Also - when posting here: Do not use a script font or one that is of a different color other than black. It's OK to use different fonts and colors for emphasis in small amounts, but not the entire post. And when posting, tell us about your Mac - model year. And which version of OS X you're running.

You also mentioned that you were having difficulty installing graphical programs. Which ones? What isn't working?