removing calendar icons and more questions…

I want to NOT show the calendar icon on my posts, and also NOT show the message that says “posted under uncategorized by admin” on the following page and other pages as well:

http://www.realtorvideotour.com/about/

how can i do it? the theme is: http://www.wpthemesfree.com/view.php?theme_id=2351

I removed:

<?php the_time(‘M’); ?>
<span class=”day”><?php the_time(‘d’); ?></span></div>

and

Posted under <?php the_category(‘, ‘); ?>

in the index.php, which i was advised to do, but it didn’t remove anything.

Also, i’d like to only choose SOME Of the pages to list in the sidebar and in the banner, not all of them. how can i do that?