1. Purchase code 

You don't need the Purchase code if you've downloaded the theme on Envato Elements. You need to register your Licence Item Code to use the theme. The purchase code is only needed for Automatic Updates and Support. Unfortunately, you are not entitled to them if you've downloaded the theme on Envato Elements. So to get a purchase code, hence support and automatic updates, you need to purchase the theme on Envato Market -  https://themeforest.net/user/vamtam/portfolio. The version on Envato Elements is more suitable for developers/designers who don't need support and update the theme using FTP.

You will find detailed information here - https://help.elements.envato.com/hc/en-us/articles/360000621443-Do-I-need-a-purchase-code.

2. Updates 

Envato Elements' Clients can only update the theme and bundled plugins using FTP. 

The latest version of the bundled plugins can be found in this directory /theme-name/vamtam/plugins. 

3. Support

Envato Elements' Clients are not entitled to Support from the Author. However, we have hundreds of articles at your disposal in the KnowledgeBase. If you need support, you can buy a licence here -  https://themeforest.net/user/vamtam/portfolio. 

4. Licence 

You will find details here - https://elements.envato.com/license-terms.