No internet after fresh XP install

Hello, at my job, I was asked to wipe an old pc and reinstall a fresh copy of XP pro. I do this often so it wasn't a big deal. This issue is that it will not connect to the internt at all, I am not sure if drivers need updated or what, but how would you do that if you have no internet connection. It doesn't have wireless either. It is an old Dell D510. When attempting to add the computer to...