I'm needing to remove the sidebar from all pages except the home
Looks like you're using a static page for your front page, yes? If so, copy your theme's page.php file and rename it "homepage.php". Edit the file and, at the very top, add:
Template Name: Home Page
then save the file.
Edit your front page and use the Page Template box to select "Home Page" then update the page. Next, edit page.php and remove references to
<?php get_sidebar();?>. That will take the sidebar of all static pages except the home page.
If you want to remove the sidebars from archive and single post pages, you'll need to remove references to
<?php get_sidebar();?> from single.php & index.php. And perhaps category.php & archive.php if you have the latter 3 template files.
And on the pages without sidebars, would "page" part be a full page size or only half still
Initially still half. You'll almost certainly need to make further changes to pull the content area out to the full width on underlying pages. But just take 1 step at a time. Once the sidebars have been removed, the design can then be re-assessed. This won't be a minor job. :)