iMac running Windows driver problems

Hello everyone I was wondering if anyone could help me with a couple problems I am having with my drivers. So i have a iMac and I installed Windows 7 on it using BootCamp and everything is fine with it except I do not have the driver CD that the computer came with because my sister bought it for me used. To be specific I can use the built-in microphone to record my voice using the Sound Recorder program on Windows 7 but if I go on skype and try to have a conversation all you can hear is static although it is perfectly clear on the Sound Recorder program. The iMac also has a built-in webcam but that also does not work nor does the built-in speakers. So basically what I am asking is there somewhere I can download these needed drivers that will work for this iMac running Windows 7. If there is any other information that is needed I would be happy to reply back as long as I can someone get this problem fixed. Thank you for your time.

What version of OS X is the iMac running? Leopard? Snow Leopard? What you need is an install DVD of the version of OS X that is on your iMac. The drivers are contained on the install DVD.

Okay so I checked it and it says that it is 10.5.8 and according to this website https://www.impaticize.com/impkb/questions/381/ that means I am running on Leopard right? If so I am going to purchase the install DVD I just want to make sure though so I don't buy the wrong thing.

Yes, 10.5.8 is Leopard. Buying a copy of Leopard is going to be expensive since you'll need a retail version as it's doubtful Apple still has a copy specific for your iMac. Buying from eBay or Craig's list will probably cost you around $100 or so.

I recommend buying a copy of Snow Leopard direct from Apple for $29.99. The Snow Leopard DVD will likewise have drivers. You can also reinstall with the same DVD.