iPod Touch is like an iPhone without cellular service. You can play music on it or browse the Internet, just like you can on an iPhone. You need iTunes, the free digital media player and application manager by Apple to copy music, including Windows Media Player files, to your iPod. Although distributed by Apple for Mac OS X, this software is free for Windows PC users as well.
Go to the Apple website (see Resources) and click "Download Now" to get your free iTunes. Click "Save" in the confirmation pop-up, navigate to the location on your hard drive where you want to save the file and click "Save" again. Double-click the saved file and follow the step-by-step prompts of the installation wizard.
Connect your iPod Touch to your PC via a supplied USB cable. iTunes will launch automatically upon connection.
Click "File" in the iTunes window and select "Add File to Library." Browse to the location of your Windows Media Player file and double-click it. Repeat this process until you add all of the files you want to play on your iPod Touch to the iTunes library.
Click the name of your iPod in the left section of the iTunes window. Click "Sync" in the right section of the window to begin file transfer. Disconnect the iPod when prompted after syncing is finished.
Select "Add Folder to Library" in Step 3 if you want to add all files from a folder.