Istallation of a printer that needs a IP Address

Hi! I am trying to install a invoice printer in my new office. I am completely hooking up a new printer to my network…trying too. I do not have an IP Address for my printer. It would have been easy if I would have disconnected a printer and used that old IP address, but this is a new office. How do I go about obtainning a new IP Address for this printer so that I can connect my printer to my network. I want everyone in my office to be able to print quotes from the PC’s. This is a big problem that I need to get solved. Please help me.