Some of the basic settings are available right after installing and activating as we described in the How to Install WooCommerce Plugin guide. But the whole power of WooCommerce versatility is in the plethora of options in WooCommerce settings.
Now, as the WooCommerce is very elaborate plugin with lots of options, we recommend visiting their documentation page for detailed description on how to set everything up. The page can be found here https://docs.woothemes.com/document/configuring-woocommerce-settings/