How many pages can print on low color ink?

You can't ask this question, having like a 1,000,000 types of printers in the world.

What kind of printer do you have?, what kind of cartridges does it use?

And even if you answer the questions above, I'm not sure that someone will be able to give you a certain answer, because of the simple fact, that if depends on what do you consider as a good print, which is kind of a direct result of the cartridge.