Restore old multibit wallet
I run a service to crack wallet files and, yes, it is possible to recover funds from MultiBit wallet files. 

Usually users password-protect their MultiBit wallet files and if this is the case and you have no idea what the password is, then typically the effort brute-force is too high. 

Since this is a wide topic with many tools to use, I advice to start looking at https://github.com/gurnec/btcrecover and then google for more details. PM me if you get stuck in the process.