Redmine

Hello
I was using a bitnami redmine virtual machine (https://bitnami.com/stack/redmine/virtual-machine) as a server for Redmine application 3.2.0. It was a minimal debian linux version with all the modules needed, working flawlessly since year 2014. Unfortunately the drive of my computer, which was holding this server, has been damaged. Some IT company managed to restore all the files from it. My problem is: how to move every kept there data to the fresh instance of Redmine. I am able to copy files directory with all the attachments held by created issues. But I don't see any way to make mysqldump right now (MySQL Server 5.5), so I can't just simply follow the usual guide for restoring Redmine :(
I set up a new virtual machine with Redmine and tried to copy entire mysql folder - It failed in a way I can't start mysql service anymore.
I reinstalled the bitnami image and this time I copied only data folder (from mysql directory), which should bring every database from the old drive - It failed in the same way
I tried to copy only bitnami_redmine folder (I minded to copy the ibdata files too) - same. What am I missing? I feel hopeless right now even though I excavated entire Internet.

Is there any different way to restore my Redmine server? Will I never get access to my projects data kept in Redmine database? Have any of you had the same problem like me? Please, help. There must be a way...