How to call core template file in magento
For calling a core template file in .phtml file
<?php echo $this->getLayout()->createBlock('core/template')->setTemplate('templateFolder/coretemplate.phtml')->toHtml(); ?>
For calling a core template file in CMS page
{{block type="core/template" template="templateFolder/coretemplate.phtml"}}Hope this article will help you. Thanks,
Pritesh

Pritesh Pethani