Install starter ink cartridges

(Video) Install Ink Cartridges

When choosing grayscale printing in the printer driver, does this use only the black ink or all the ink cartridges to produce the grayscale image?

Why do the color ink cartridges run out of ink even though I never or rarely print in color?

The ink cartridges run out very quickly. Is there any reason for that?

Can third party ink be used to refill the ink cartridges?