Hello,
The demo you refer applies “Full info on image” design in the Theme Settings > Shop > Product style.
You can change the font by means of Advanced typography option, which allows to choose the item from a drop-down or insert your custom CSS class. Please navigate to the Theme Settings > Typography > Advanced Typography.
Here is the documentation providing more detailed instructions: https://xtemos.com/docs/woodmart/advanced-typography-settings/
You can set 1 or 2 columns on mobile in the Theme Settings > Shop page > Product grid. https://prnt.sc/t7fvri
Best Regards