Hi There,
Thanks for writing in! For the “read more” please add this on your Custom > Global JavaScript on Customizer
jQuery(".archive .more-link").text(function(index, text) {
return text.replace('Read More', 'NEW LABEL');
});
To remove the headline add this on your Custom > Global CSS on Customizer
.archive .x-header-landmark {display: none;}
But! please check your entire custom CSS here: http://csslint.net/ and address all the errors.
Let us know how it goes.
Cheers!