After this section you can edit content via Page Builder, Go to Pages and edit Home page

Or in your site front page, in the admin bar find Edit Page ( Back-end Editor ) or Edit with WPBakery Page Builder ( Front-end Editor )

For changing Logo go to Theme Options > Header > Logo

For changing size and margin, go to Theme Options > Header > Top of Header >  Logo element

This section is Slider, You can edit, add or remove go to Dashboard > Revolution Slider

For disabling slider or changing it with other title types

Example Breadcrumbs or Title, Go to Page Edit > Page Settings > Title Type

For overall website title type go to Theme Options > Title & Bredcrumbs

This is a Service Box elements.

You can edit icon, text, typography, colors and margins inside of this element edit box in page builder.

This is Carousel element, that contains 3 Testimonials elements.

You can edit Carousel settings in its edit settings and change the Testimonials from their edit.

This is Progress Bar element, that you can find it in page builder.
For changing Custom link go to Theme Options > Footer > Bottom of Footer > Icon and Text Element in the right place
For editing or removing Back to Top icon go to Theme Options > Footer > More
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 section is Footer and this 3 columns are Widgets, You can edit Widgets from Appearance > Widgets

In widgets find Footer 1 to Footer 3 sidebar area sections and edit them.

For changing background of Footer, Go to Theme Options > Footer > Footer Widgets > Container Style Kit

How to change background image? You need to Edit Column >  Design Options

How to change background image?

You can edit row under tab General find Parallax image and replace, add or remove it.

How to change background image?

You can edit row under tab General find Parallax image and replace, add or remove it.

This is Social icons element, you can find it in Page Builder and edit it in any design or icon
For editing menus items go to Appearance > Menus

For editing menu navigation settings go to Theme Options > Header > Top of Header > Menu Element

And for styling menus go to Theme Options > Header > Top of Header > Menu Styles of this Row

For editing Off Canvas Widget button go to Theme Options > Header > Header top bar > Widgets

You can set the inside widgets from Appearance > Widgets