Hello,
Reviews tab should be added to single product page automatically.
If it’s not there please provide us with wp-admin panel credentials in Private Content.
How to add upsell products you can find in Woocommerce documentation:
http://docs.woothemes.com/document/related-products-up-sells-and-cross-sells/
If you’re using WP-eCommerce plugin, there is no the feature for upsell products.
Regards,
Eva Kemp.