You're probably better off starting over with the parts he gave you.. it looks like there is a filament transformer and ballast/current transformer for the tube. Not sure what he used to generate HV, probably a diode ladder. That is not a power supply, it is parts of a home-made jumble; especially if he cannot provide his schematic.
Have a look at sam's laser faq; there is a simple argon psu diagram using a variac, filament transformer, etc. That should be a decent start to re-do this mess.