Minor Changes to Well-Documented Wordpress Theme (From Themeforest)

Hello, I am working with the Brooklyn theme ([login to view URL]), and I am stuck in some very minor issues. It is a well-documented theme and there are enough options for nearly everything that needs to be done, with very little coding needed. I want help with respect to: 1. Changing the back-ground image which comes on first-view, and making it responsive across devices. 2. Changing few images and icons on the website. 3. Editing the contact form being displayed on the website, and having a blog button next to it. 4. Slight tinkering with the logo and menu. The theme options provide for the same, but cannot locate them. 5. Creating 1 page using the page builder in the wordpress theme itself. Considering the minor nature of the changes, the same should hardly take any time.