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 background color or styling of this row, go to Theme Options > Header > Bottom of Header >  Inner Row Container
For edit or remove banner ad, go to Theme Options > Header > Header >  Image Element
For adding or removing social icons, go to Theme Options > Header > Social Icons

For changing margin of social icons container, go to Theme Options > Header > Bottom Of Header >  Social Icons Element

For changing Background Image go to Theme Options > General Styles > Body

For changing layout to full width in same theme option section find Boxed switcher and turn it OFF, Then open Layout StyleKit and remove margins.

For editing mobile and tablet header go to Theme Options > Header > Mobile, Tablet Header
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 or removing shortcut links, Go to Theme Options > Footer > Bottom of Footer and find Text and Icon elements
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 is News Ticker element, By editing it you can customize styling, query and settings.
This is Content Box and inside it you can find/edit Text element and Button element.

For changing Background color of Content Box, edit it and find Overall Style Kit.

This is Content Box and inside it you can find/edit Text element and Button element.

For changing Background color of Content Box, edit it and find Overall Style Kit.

This is Posts Grid element and its query showing Latest Products, You can edit its styling and query settings.
This is Image element and have minus margin, By editing Image element and finding Container style kit you can change margin.
This is Image element and have minus margin, By editing Image element and finding Container style kit you can change margin.
This is Content Box and inside it you can find/edit Text element and Subscribe element.

For changing Background color of Content Box, edit it and find Overall Style Kit.

This is Carousel element and Inside Carousel included Posts Grid element, Both Carousel and Posts Grid have separate settings. You can edit each one separately.
For editing menus items go to Appearance > Menus

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

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