Thumbnail Image of Post not showing in Sidebar

Hey Guys,

Im a little new with wordpress so i need some help. I got a new site up and i added the first post. Now on my sidebar of the homepage it should be adding a thumbnail from the post although I am not sure which or what image it takes from here is the code i think that relates to it.

[ Moderator Note: Please post code or markup snippets between backticks or use the code button. ]

<?php $postaffurl = get_post_meta($post->ID, 'affiliate_url', true); ?>
            <?php $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'small-thumb' ); ?>

Or this one

<div class="topprodleft">
                    <a>" rel="nofollow"><img src="<?php echo $image[0]; ?>" width="100" height="100" alt="<?php the_title(); ?>"></a>
                </div>

Any ideas?