You were given a printer, and you don't know it's provenance, yet you're surprised that it isn't working perfectly?
I am trying to figure out from what you've said what your precise complaint is. "No black just reading the blog" -- it won't print in black? The black cartridge is out?
Suggestion: you can do fine with just the under-utilized color cartridge by, e.g., pulling up a Word document, selecting all the text, and changing its color to dark navy blue. This is close enough to black to make it easy to read but (a) doesn't require the black cartridge while (b) expending the color cartridge, which typically sits there nearly totally unused.
If you posed a clear question, it would be easier to get a precise answer.