tasko on "How to remove the date, author and reaction on the top on a PAGE?"

try to remove this code:

<?php if ( comments_open() ) : ?>
<div class="post-meta">
<?php responsive_post_meta_data(); ?>

<?php if ( comments_open() ) : ?>
<span class="comments-link">
<span class="mdash">—</span>
<?php comments_popup_link(__('No Comments ↓', 'responsive'), __('1 Comment ↓', 'responsive'), __('% Comments ↓', 'responsive')); ?>
</span>
<?php endif; ?>
</div><!-- end of .post-meta -->
<?php endif; ?>

but do it in your child theme.