To Hide / Show Price:
<?php if (Mage::helper('not2order')->getShowPrice($_product)) : ?>
... PRICE CODE LIKE 'echo $this->getPriceHtml($_product, true)' ...
<?php endif; ?>
To hide / show cart button:
<?php if($_product->isSaleable()): ?>
... CART BUTTON CODE ...
<?php endif; ?>
For more information about the implementation in custom themes, check this link:
https://cart2quote.zendesk.com/entries/42868763--Design-Not2Order-templates-and-custom-themes