Hi Tuck,
Below are the answers to your questions:
1/2. To add the text at the left, and right with image for the slider you have to activate the Revolution Slider Plugin in your site.
3. You can increase the excerpt option to have some long paragraph. To increase the excerpt option Go to Appearance > Theme Options > Advance Options > Excerpt Options.
4. Make us clear that what types of custom button you need in that section?
5. Yes you can remove the “read more” button from the row of “Responsive design, beautiful view and Mac-book air” to remove it Go to Appearance -> Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save all changes button:
.widget_service .display-center a.more-link,
.widget_service a.more-link,
.widget_service .column a {
display: none;
}
6. Go to Appearance -> Widgets and drag and drop the suitable widgets you like in the Footer – Column1/Footer – Column2 and Footer – Column3 Sidebars.
7. You do not have to activate the “click to top” button (^) it will automatically activate while your content is too long.
Thank you!