Customizr theme I would recommend or the twenty twelve is good, a lot of nice themes it's a questions of trial and error.
Clickable images: add a link via kitchen sink, click on image then link icon in kitchen sink, another box opens put in the page ie full url cut and paste it from your browser of the site add title,click ok
You can add a contact page by using contact form7 this is a plugin which adds a bit of code to the page you set for contact page.
Sharaholic plugin is good for social media icons
Slide show you make the banners in Photoshop for customizr 1170 by 500
and the wordpress is 960 by 250
E commerce plugin hmmm WP ecommerce, Woo,
This is a a great video on the how to's of setting up customizr but watch and re-watch to get it right
http://www.youtube.com/watch?v=OKDZoIaVg60