Type in your browser something like: "format a hard drive in Windows 98" (without the quotes) and search through the many websites that give very detailed instructions. Much more detailed than you will get on any forum. Print the best (clearest) instructions and keep for future use. Have a look at click here
I think the simplest way to transfer a lot of data is by using a "USB Data Link Cable". Search in your browser for: "USB Data Link Cable". Most large computer stores should have them in stock.