Crystal

So i bought an already converted epson xp-15000 from someone. when I received it it was a hot mess! lets just say the ink was everywhere and the cartridges were broken. anyway he told me that it had the chipless firmware on it and when i do a test print the word firmware is on there. ok I have no idea about computers or printers so I am sorry. I am trying to get my now converted printer to print but I am running into so many issues. one issue do I have to buy a firmware or software to download onto my computer to work this printer? i did buy new cartridges that were chipless like he said to do. but idk what to do next I am stuck! also there is a black hose sticking out from the back of my printer that keeos leaking black ink everywhere. what is this for and should I remove it? i need so much help to et this going but I cant find anything onlone not even youtube. if someone coud help I would greatly appreciate it. Thank you