Hello,
1) There is no such option in our theme by default. What limit do you want to have there? Provide us with WP Dashboard and FTP access to your site. We’ll check if we could change that for you with minor customization. If not then you’ll be able to submit a customization request.
2) WooCommerce does not display images on the checkout page by default. You can implement that by additional customization, for example, https://www.techiesandesh.com/woocommerce-show-product-image-checkout-page/
Regards