You will have to go through a data recovery service like the one linked below as there's no easy way for a novice to recover data without a 99% failure rate.
http://www.drivesaversdatarecovery.com/
If something like that is too expensive, you may have to determine whether or not the data is truly worth saving. Also, you may want to consider a backup method for important data like that in the future (external hard drive that doesn't stay plugged in all the time, USB thumb drive, burning things to DVDs, etc).