Thread:Project:Support desk/Parser Functions

I just installed MediaWiki at my site, and apparently I need Parser Functions installed. Here's an example page.

http://immortal-thor.com/wiki/index.php/Journey_Into_Mystery_Vol_1_84

And this doesn't appear to exist

http://immortal-thor.com/wiki/Special:Version

I'm not very technical minded so I could really use some help on getting my Wiki up and running so I can use templates and such. I've read through the FAQ but I'm not really understanding what I'm supposed to do. Exaclty HOW do I install Parser Functions (and anything else I appear to be missing)?

Thanks!