About your EMAILS. Do you use GOOGLE GMAIL?
If so, your emails are still there.
It's taken a lot of posts to find out this machine has RANSOMWARE but some Antivirus companies do provide the unlock key for free. But since we don't know which it was, no one can tell what to do next.
At this point it may be time to consider how much all this is worth to you. If it's not worth calling up Kapersky's antivirus support for a few hundred then we know the files are not worth a few hundred and then you can decide to forget it, reload the OS and next time be religious about backup.