I have no clue what flavor of linux your using nor anywhere near enough info to be much help.You need to find out what hardware exactly your using and exactly how your distro of linux deals with sound issues.I cant imagine a linux distro these days not using ALSA, its pretty standard.Combine that with the fact your a complete newbie Im not sure what to tell you, I could type out 30 pages of stuff and it still wouldnt help you.
Try this, open this file with an editor as root: /etc/rc.d/rc.modules
scroll thru that and see if your sound hardware is listed in the sound section, if so, uncomment the appropriate line and reboot.Not sure what else to try at this point.
Laptops can be tricky to deal with.