As arslaan ejaz said, you can use wp_query. But I think that answer is not enough for your question. You want to show first post with thumbnail and others with titles only right?. It can be done by php count. Here is what I am using on my site. check below code, it will show first post with thumbnail, title and excerpt, other three posts with title only from category ID 1.
<div class="main-div">
<div class="thumbnaildiv">
<?php $count=1; $query = new WP_Query('showposts=4&cat=1&offset=0'); if ($query->have_posts()) : ?>
<?php while ($query->have_posts()) : $query->the_post(); ?>
<?php if($count==1){ ?>
<h2>
<a href="<?php the_permalink() ?>" rel="bookmark">
<?php the_title(); ?></a>
</h2>
<div class="thumb">
<a href="<?php the_permalink(); ?>">
<?php the_post_thumbnail('thumbnail'); ?>
</a>
<p><?php the_excerpt(); ?> ...</p>
</div>
</div><!--div with thumbnail, title, and excerpt end-->
<div style="clear:both"></div>
<div class="without-thumb">
<ul>
<?php } if($count>1){ ?>
<li>
<a href="<?php the_permalink() ?>" rel="bookmark">
<?php the_title(); ?></a>
</li>
<?php } if($count==4){ ?>
</ul>
<?php } ?>
<?php $count++; endwhile; else: endif; wp_reset_postdata(); ?>
</div><!--div without thumbnail end-->
</div><!--main div end-->
The div's I have used is for information purpose only. You can change and style it as desired.