Hi,

1. I don't understand exactly. 

2. Hide comment : http://www.awesomescreenshot.com/image/1690908/7fd99c53b30ef825ce468e363b0b8fec

3. Hide tags : open file : archi/single.php

Remove code : 

<?php if(has_tag()) { ?><span><i class="fa fa-tag"></i><?php the_tags('', ', ' ); ?></span> <?php } ?>

4. Tell me clearly and send me csreenshot. I don't understand exactly you means