General queries – Catch Everest theme

Hi, We are a startup and have installed the free version of Catch Everest theme for WordPress, it has worked just fine thanks to your team. It would be great if you could help us out on few things so that we could go live with your company. We have our main site hosted on www.impelpro.com and plan to have a sub-domain blog.impelpro.com for our blogs, alternatively we could have a page in our mail site www.impelpro.com as blog and link that to the widget for latest updates: General - 1. How to remove the left, top, right, and bottom margin so that the page is displayed full-size on the screen? 2. How to ensure that when the page is made full-size the floating social media control on the left does not go outside the screen? 3. Presently i have specified the css within the HTML tags on each page, how can i specify my own css and add that to the HTML tags? 3. How can i customize my side-slider for individual pages, for example on careers page under resources menu i have a contact us form which says "join us" but when i enable the side-slider i want "free quote" form to be displayed and not "join us". Home Page - 1. How to change fonts and reduce the height of footer section (footer 1, footer2, and footer3) ? 2. How to change the fonts and spacing for Featured content options? 3. Home Page - How to resize the images for Featured content options? Menus - 1. How do i link the route menu option to "*" so that it does not go the any page? 2. How to link "blog" sub-menu under resources to my sub-domain blog.impelpro.com? Once i add a new blog to my sub-domain blog.impelpro.com will that automatically be reflected on main website www.impelpro.com -> latest update in the footer? Regards, ImpelPro