You would need to add it to your menu. If you look at the following guide, it shows how you can create menu items 🙂
There is no way in which to opt to keep this. It will be present during version 4, but will be removed on version 5 entirely.
If you do wish to use it on 4 in the meantime, please take a look here, which guides you through how to get this set up, including your departments
There is no way in which to create dummy content on the platform at present unfortunately.
Importing from another community can be done. You would need to contact us if you have another community you need to import from
We do not have a developer license, and you would not be able to obtain the code without a license. I fyou want to take a look at the following pages, this may help you obtain some knowledge on how you would integrate
https://invisioncommunity.com/developers/