First, I must ask that you please use punctuation in your posts as it is very difficult to understand what you're writing in one long run-on sentence.
Secondly, DOS and Unix are VERY different. They might have some of the same commands but that's only to make the transition for DOS users a little easier. There's just too much information for us to cover in a thread regarding the Unix command shell, especially since there are various shells out there for Unix (sh, csh, ksh, bash, etc.).
Here's a little push to get you on your way. I did a Google search for "beginner's guide to terminal Mac OS X" and I got the following:
http://www.l.google.com/search?hl=en...=Google+Search
Take a look at the links there and that should get you on your way to getting familiar with the OS X Terminal.