After you get a computer, do you have to buy another thing to activate the computer?
Well you need to wire it to the Internet with a modem, a router, and a cord.
Not really what computer do you have, you might have to buy some programs when you get the computer started though
After you purchase a computer with all the necessary accessories you will still need an operating system for it to work. In addition, you will also need to install software like Microsoft Office Word to make the computer practical.