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 > Header >  Logo Element

For editing mobile and tablet header go to Theme Options > Header > Mobile, Tablet Header
for editing search element and styling go to Theme Options > Header > Header > Search Element
For changing this row line go to Theme Options > Header > Header > Inner Row
This section is Slider, You can edit, add or remove go to Dashboard > Revolution Slider

For disabling slider or changing it with other title type

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

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

For editing or removing any widgets, go to Appearance > Widgets > Footer 1-6
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.

This section is Footer and this 4 columns are Widgets, You can edit Widgets from Appearance > Widgets

In widgets find Footer 1 to Footer 4 sidebar area sections and edit them.

For changing background color of Footer, Go to Theme Options > Footer > Footer Widgets > Row Container Style Kit
For changing Social Icons go to Theme Options > Header > Social Icons, For changing margins go to Footer > Bottom of Footer > Social Icons Element
For changing Background go to Theme Options > Footer > Bottom of Footer > Container Style Kit
For changing Copyright text go to Theme Options > Footer > Bottom of Footer > Icon and Text Element
This two columns are Services Elements, You can edit Title, Text and Image icon
This 6 boxes are Content Box elements and each one have separate settings and content.

When you hover over box you can’t edit content because Flip effect, So first edit content box and under Flip Box tab turn it OFF, then try to edit inner content of box.

When you’ve finished editing content, again edit content box and turn ON flip box effect. Also under Flip Box tab you can change settings of back content of box.

These are blog posts, You can edit Posts Grid element and change styling, For adding new posts go to Dashboard > Posts 
This is Tabs element, By editing Tabs container element you can change general settings, For editing each Tab items, first click on it, then hover over inner content and edit inner tab item.
This is Video Popup Element, You can add any YouTube or Vimeo video URL for it.
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.

Edit Title and Text element and under Line tab you can change line or customize styling.
Edit Title and Text element and under Line tab you can change line or customize styling.
Edit Title and Text element and under Shape tab you can change background icon or customize styling
Edit Title and Text element and under Line tab you can change line or customize styling.
Edit Title and Text element and under Line tab you can change line or customize styling.
Edit Video Popup element and find Background Layer stylekit then you can customize dots under image.
For editing menus items go to Appearance > Menus

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

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