Based on what you are saying it sounds like the landlord has some non-compliant electrical hook-up and probable funky rehab work in place. My first suggestion is that they get a copy of the landlord/tenants rights ordinance. The landlord should have given them a copy at the lease signing. But we all know that doesn't happen very often.
They should put their concerns in writing and stick to it. If this were to go to housing court, the judge isn't going to side in the landlords favor. The lease saying the tenant pays gas and electric, won't be presumed to include 'for other people'. Just doesn't work that way.
Fighting with the landlord is never fun and can make the remainder of the lease period a real drag. I would suggest they assess what they want the outcome to be. Are they willing to move? Paying those other utilities will add up. Depending on how bad the gas and electrical work is, it could cost the landlord a fair amount of money to correct it.
They can fight this and win but do they have the stomach for it?
If the landlord isn't willing to put doors on the bedrooms, then he's probably a slumlord to some greater or lesser degree. Doors don't cost that much. It should be a non-issue.
I did an inspection for a coffee shop that suspected the landlord had tapped into their gas line. Guy was a real jerk and tried to harass the tenants. Until I found the T he had hidden deep in a wall cavity where he had tapped into their line. Of course, he didn't do it and knew nothing about it. 'Must have been a mistake by a dumb worker'.