I need buttons added to my mobile website

General information for the website: selling products
Kind of development: Customization of existing website
Description of requirements/features: General information for the website: Website for posting ads/ items for sale.
Kind of development: Customization of existing website
Description of requirements/features:
I need a fixed pull out button added to my mobile site, a 'like' button and a 'add to cart' button added to all product ads. I also need colour changes made to previous buttons.

I have attached example pictures of the type of buttons I need.

I need this job started today and finished ASAP

Thanks