You want use a modern multi-function printer in combination with a x86_64 computer running a current Linux distro. You shoud use CUPS in this case.
LPR is the right choice for an ancient printer (e.g. dot matrix printer, early laser printer, early inkjet printer) in combination with an ancient ia32 computer (e.g. 80386, 80486, Pentium/K5/6x68, …) running an ancient Linux distro.