In CLIENT:
1- Navigate to EmbeddedData_Players - in the binaries -
2- Remove "<UnlockLevel> </UnlockLevel>" of the Classes you want to
3- Modify "<UnlockCost>*The price of it</UnlockCost>"
To "<UnlockCost>0</UnlockCost>"
In SERVER:
1- Navigate to - dat1.xml
2- Find the classes you want to have in start of the game
3- Remove "<UnlockLevel> </UnlockLevel>" of the Classes you want to
4- Modify "<UnlockCost>*The price of it</UnlockCost>"
To "<UnlockCost>0</UnlockCost>"
Rebuild all, and you're done!
If you have any problems, tell me.