Header and Featured Image sizes

Hi I am using the verity pro theme and I would like to make the following changes to my site, but I am struggling to get them made: Front/home page: 1) Top Menu - How do I change the colour and size of this menu? (On all the other pages the colour is black except for the home page) 2) Header Image - How do I move the image down on the page, so that it only starts below the top menu (i.e. so it does not extend to the top of the page and behind the top menu) 3) "Our Featured Content" & "Recent Posts" headings - Can these be resized? 4) The featured content headings ( in the 3 columns, currently "Reading", "About Us", "Children Learning reading Review" have been modified using additional CSS code to force them to use "Trebechet MS" font, but when the page resizes for mobile devices, these change to italic. How do I remove the Italic on the smaller screens? 5) The "first post" background colour and "scroll up" button is a purple colour. Where is the setting for this or how can I change this? Post pages: 6) The featured images on my post pages fill so much of the page, how can I reduce them so I can view the image and see the heading of the post before the fold on desktop display? My site is http://coolkidshub.com/ But I don't have dns pointing to the site yet as it is not live. The IP address is 35.209.162.24 Any assistance that can be provided will be greatly appreciated. Regards Brandon