Is there a way to view how much ink is remaining?

Replace Ink

When selecting 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?

Is there any way to reduce Ink consumption?

Where can I find the ink cartridges for my new Brother machine?

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