I am missing 4 ink colors- but nevertheless I still installed the printer without the 4 colors.
Why would you do that? The only way the printer is going to function properly is if ALL cartridges are properly installed.
Now in order to get the printer to initialize, you'll need to pull all the cartridges first, then you'll need to get the missing cartridges making sure all are more than half full and then you can turn the printer on and wait for it to ask you for ink. Once it does this, you can install all the cartridges.
Depending on how old the printer is and how long it's been sitting will determine if it's viable or not.
Good luck with your new printer and welcome to LuLa.
Mark