Question about rights on assets i purchased through Marketplace

Hi, i wanted to ask about rights for using assets i bought through Marketplace.
I know that after you buy assets on market you can use them as your own in your game.
My question is
If i bought assets and i already use them in game which i plan to publish later
Can i use Pictures & screens for example on my website where i want to post about projects witch include game i work on.
I bought characters so i want to share pictures of models there.
Do i have rights on pictures i take in editor of that assets to show characters as mine in game?

If a sell an asset on marketplace and i buy and use units from other asset?