Refining a typical store on Bitrix

The services of a specialist on Bitrix sites are required. A standard store needs to be redesigned. In the standard template, you need to display the minimum price on the product list page (from the list of available active offers) and it is necessary that this offer has already been selected (i.e., the minimum price is displayed). When you press the button, buy it in the cart.
Now the offers are already sorted by price using the script, but not selected. Therefore, when you hover the mouse on the button "Buy" appears the inscription "Select the characteristic". This implementation is not to be liked. You need to take a default pattern and implement everything by means of the Bitrix itself.