How to make changes to layout

I bought the Catch Everest Pro theme yesterday. Now I am trying to change the layout of the home page and footer. For the home page: For the Layout Option we have chosen Right Side. We are using Home Page Featured Content for the home page. Home page would not have any other content rather than Featured Contents. We have 10-12 featured contents which currently are occupying 3 columns. Side bar is being displayed beneath the featured contents. However the desired layout is to have it as a fourth column in the right side of featured contents. For the footer there is only three Footer Area, so the footer only can be three columns. I wonder if we can make it 4 columns. Also I wish I was able to set proportions of column widths like 2* 2* 2* 3*, so the last column would be a little wider than others. I know this is a theme designed as it is. However, I have been asked to make this changes after I bought the theme.