Hello,
Thanks for using our theme.
Please post different questions via separate topics.
1) You need to enable registration in the settings of WooCommerce plugin. WooCommerce > Settings > Accounts & Privacy > Account creation settings and Registration privacy policy
https://docs.woocommerce.com/document/configuring-woocommerce-settings/#accounts-and-privacy-settings
2) Watch these videos – https://youtu.be/eDclashcCwo https://youtu.be/mBp33hPMgnA
3) https://www.8theme.com/topic/dashboards-downloads-section/
4) There is no such possibility, by default. You can submit a request here – https://www.8theme.com/taskboard/
Regards