This is a Title and Text elements.
You can edit this element edit box in page builder.
For editing or removing Back to Top or Quick Contact items go to Theme Options > Footer > More
Instead Quick Contact also you can create any page and assign it.
For changing Copyright text go to Theme Options > Footer > Bottom of Footer > Icon and Text Element
For changing Background color go to Theme Options > Footer > Bottom of Footer > Row Container
This is a Page Content widget that contains a page content, so you can edit this part in Pages > Footer Contact Information