I got my new computer working with WoW. i wanted to add a few addons. I thought in my WoW folder there is a folder called add-ons.....i only see cache, etc. Any idea why a folder named Add-on isnt there?
Where else can i load the add-ons to?

Moved your post to the help forum.

<WoW install directory>\Interface\Addons

Be sure to extract the addon extracts into its own subfolder, e.g.,

Interface\Addons\MetaMap

Under the individual addon's folder, you should see some .lua files, a .toc file, and some others if it extracted correctly.