You can find information about the loop here and here, inside the loop the post
object is available, you can get the post
data there, this includes the content, the title etc. Example:
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>
<?php
//stuff here
the_title();
the_time();
the_content();
?>
<?php endwhile; wp_reset_query(); ?>