A good friend of ours live in an old farmhouse. She was telling me earlier that molds are in their clothes, shoes, bed etc...so now they are sleeping in a different room. She was asking me of how to get rid of them. Honestly, I have no clue other than open the windows and let the air and light in. I always thought that mold can only be found on food and ceiling but never clothes. Part of their problem I think is that they are not very good housekeeper meaning they hardly wash their clothes and always have their room in the dark. I'm trying to help her out as much as I could giving her advice of what to do but unfortunately when it comes to her problem I don't have any advice. I'm wishing that you guys might be able to help me out a little bit so that I can tell her. Another problem too is that their room is like in a basement and the upstairs is the bathroom and the toilet is leaking from the wall. They are renting that house right now, since they are in the military. But I know that the house they are in is an old german farmhouse. You can just look at it. Its falling apart.

First off, stop the water leak. Either the landlord should do it or they should. At this point it really doesn't matter but the mold problem won't go away until the water leak is stopped. The landlord's homeowner's insurance MIGHT cover the damage to the walls and floors. If not, hopefully they have renter's insurance and that might help them with their belongings.

Next they have to wipe down everything that will stand it with bleach - the walls, the floors, etc. The drywall, if there is drywall, will need to be removed and replaced. If they have plaster walls, usually the surface can be treated with bleach and repainted. A fumigator can come in and put a mold killing gas behind the plaster walls to treat the wood lathe.

Yes sunlight and getting the humidity out of the house will help - but not until the water leak is fixed.

With water leaks come bugs, not just water damage and mold. The landlord really needs to fix the problem or he isn't going to have a house to rent! If he won't do anything, they need to check with the local housing authority which might have some jurisdiction to get the landlord to do something.

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ITA with cookie2. One other thing that they may want to do after the fact is to get a dehumidifier- that will take away some of the humidity that helps cause the mold!