How to open Terminal, well there are several ways to do that
1. Open spotlight (cmd + space) and write terminal (like Windows + r then cmd)
2. Open Launchpad and then under Utilities you have terminal
3. Keep the terminal in the Dock
4. Make keyboard shortcut
http://www.shadowlab.org/Software/spark.php
http://www.red-sweater.com/fastscripts/
Now if you want any help regarding any commands
Type
man yourCommand
man ls
If you want to change the Terminal look, go to Preferences (cmd + ,) and change it your own way. You can set a background image also đ
To exit the terminal with exit command
1. Terminal -> Preferences -> Settings
2. Go to Shell
3. Under “When the shell exits”
4. Select close if the shell exited cleanly