Blog overview layout

Hi,

I wish to make some custom arrangements on the blog overview layout :

– I’d like to remove the breadcrumbs row just above the category menu (the one showing the category name on which the user is). How can I do that ?

– All my pages in the website are having specific rows repeating all over the website (contact bloc, social network bloc, google map and so on…). These blocs are created via Templatera, and I wish to add them on the blog overview page, right under the posts list.
How can I call for these items, and which file do I need to override in order to display those on this page ?

Any help on these details will be greatly appreciated :)

Thanks,