When you make a page, if you do not need the sidebar (if i get your question right), you can use page template ‘One column no sidebars’. That will not display the sidebars. Here is an example of such a page –
https://www.livemeshthemes.com/squash/page-no-sidebars/
Pls refer to the documentation which explains a little bit about these page templates available with the theme or look at the sample data. Hope that helps.
As far as Jigo shop goes, you will need to do custom styling to make it look better. You can use Custom CSS tab in theme options panel to input your CSS changes or use custom.css file in the {theme directory}/custom folder.