How do you get a browser on your computer?

We have a computer that had to have XP reinstalled on it. It has no other software. If you can’t hook up to the internet to get a browser, and you don’t have a browser on a disk somewhere, what do you do?

Could some other software disk lying around have a browser on it? If so, which ones? Could we download the software to another computer and put it on a disk and install it that way?

Also, we have no installation disks because the computer didn’t come with any and said they weren’t necessary because the necessary files were on the computer (hah!). Will we need to find drivers for the network and wireless hardware or does XP have that covered?