Hello,
Please post different questions via different topics, to prevent misunderstanding.
1) Go to pages > Edit home and Shop page > Page layout settings > compare settings “Use custom footer for this page”. Set Sefault here http://prntscr.com/pua2cd for Shop page and check then.
2) About buttons, describe the desired result in more detail.
To find out classes, inspect code using inspector tools.
Open a web page in Google Chrome. Either:
-Select the Chrome menu at the top-right of your browser window, then select Tools > Developer Tools.
-Right-click on any page element and select Inspect Element.
The DevTools window will open at the bottom of your Chrome browser.
Regards