I've commented the lines out which you need to remove entirely if don't want these features. You can turn comments off within the WordPress admin area also.
<?php get_header(); ?>
<!-- posts -->
<div id="posts" class="span-16 prepend-1 append-1">
<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<div class="post" id="post-<?php the_ID(); ?>">
<div class="postheader">
<div class="commentcount">
">
<img src="<?php bloginfo('template_directory'); ?>/images/commentsicon.gif" alt="<?php comments_number(__('No Comments'), __('1 Comment'), __('% Comments')); ?>" />
<?php comments_number(__('0'), __('1'), __('%')) ?>
</div>
<div class="posttitle">
<h2>" rel="bookmark" title="<?php the_title(); ?>"><?php the_title(); ?></h2>
<!-- <span class="postmeta"><?php /* the_time('l, F jS, Y'); */ ?> | <?php /* the_category(', '); */ ?> | <?php /* the_author_link(); */ ?> </span> -->
</div>
</div>
<div class="postcontent"><?php the_content(__('
Continue reading...')); ?></div>
<div class="posttags"><?php the_tags('Tags: ', ', ', ''); ?></div>
</div>
<?php /* comments_template(); */ ?>
<?php endwhile; ?>
<div class="navlinks">
<img src="<?php bloginfo('template_directory'); ?>/images/backtotopicon.gif" alt="Back to top" />Back to top
</div>
<?php else : ?>
<div class="post">
<h2>Not found!</h2>
<p><?php _e('Sorry, this page does not exist.'); ?></p>
<?php include (TEMPLATEPATH . "/searchform.php"); ?>
</div>
<?php endif; ?>
</div>
<?php get_sidebar(); ?>
<?php get_footer(); ?>