This printer is not sold with the USB cord included; you will have to buy that separately if you wish to have a USB connection. However, the printer does connect to a wireless network so you can print without a USB connection if you have a wireless network.
Unfortunately yes. To my knowledge there aren't printers (at least for home use) these days that still come with a USB cable. Not like the "good old days". It's on you to get one.
The printer came with full ink but not the full size cartridges. I bought a full size black cartridge but have not had to replace the beginner one that was in the printer. I have used about a quarter ream of paper so far.
I believe it will. The printer has wireless capabilities which means it will detect any wifi signal available within its reach and so if your computer is able to get the same wifi signal then they will connect.
No. But they did get 1 out of 3 right. Height is not 15.4 inches but is 5.4 inches. Width is correct - 17.5 inches. Depth is not 23.9 inches but is 13.9 inches (with door open in front).
I used a CD to install, but the packaging information did give a website that you could use to install, so I think that you would be safe without a CD drive.