You have to go to the printer settings and select print in grayscale or black only. There's a setting to do that in the printer settings under preferences. If you need additional help, visit Hp.com support and type in the printer model and find the manual or you can call and ask HP also.
Yes and sort of. It does come with cartridges but the wireless is sort of screwy. We use both PC's and Macs. The connection fails regularly. But if you can hardwire it, then it works fine...but I'm assuming you're shopping for wireless printers on purpose. Also, the replacement cartridges cost about the same as a new printer (which also comes with new cartridges). We ended up replacing our 4500 with the HP 8600 Plus and I'm MUCH happier with it. Hope that helps! :)