How to limit tags displayed on a single post

Hello,

I need help about tags on one of my posts (the theme is generated by Atahualpa theme):

http://getridofcandida.org/l-glutami...this-first.php

The tags are automatically generated by a plugin, but they are too many. I want them to be displayed randomly between 5 or 7 tags only on the post. But I couldnt find solution I need. I have searched on many forums with no luck, maybe because I am totally noob at php coding.

Can someone help?

Thanks
Arie