Hello,
you definitely have conflicts between jQuery and MooTools. You also have multiple jQuery libraries.
jQuery Easy can help you out, but you still have a conflicting script that needs to be manually changed or you won't be able to have your site working correctly. I suspect you can use jQuery Easy with the default settings but you still need to change the file /templates/theme956/js/scripts.js. The '$' is used for jQuery (I believe) but this symbol is supposed to be kept for your MooTools scripts. I think you could enclosed the whole script in jQuery(document).ready(function($) {...});