Hi Becca, 
Thanks for Loving our Theme. Your answers are following,

1. To change the Section Heading, You have to change the Page Title of the page where you select the section.
2. Just keep this field empty when you adding a new Price. And to hide it from the front page use this custom css. <code>section.rex-pricing article h4 .price, section.rex-pricing article h4 small { display: none; }</code>
3. Currently we don’t have support for that, but we will add it soon on future update.