Hey there,
You can disable comments here whilst creating or editing a page/post:
https://monosnap.com/image/UFx56Xxhxkqji91SPgWrvacVjX7lpk
You should see the meta box on the page, but if not you can drop down the Screen Options in the post/page editor and enable Discussion there, the metabox will then show.
I don’t know this theme personally but if it leaves any kind of closed message on the page you could instead hide it all with CSS:
.comment-respond{display:none;}
Or you could edit it out in the PHP code, let me know if you need help doing that instead. ??
As for the sidebar, I don’t see one there so I guess you removed it and you want to resize the center area?
If you were to do that in CSS you’d change this:
.col-md-8 {
width: 100%;
}
Keep in mind anything using .col-md-8 will have this change. Really the best way would be changing the class from .col-md-8 to .col-md-12. This would require a code change rather a CSS override. Let me know if you’d like to do that instead, I’ll take another look ??
Hope this helps.
Take care.