Yes those are scripts! Neal is right, Ctrl+K is the control for your colors that makes it colored and what not! Im a beginner as well. If you go to Help in your mIRC?? In that help menu there you will see contents, click on it. There you should get all your answers to all your questions! I've used that, and it helped me even google lol. You should check out some you tube videos as well!! They're all useful, believe me! Hope this helps!! And if you need some more help, please feel free to write back!
Good Luck & Many Blessings