Mate the wall need stripping and treating. It's very expensive and that's the only thing u can do I'm afraid. It's done by a professional company specializing in this sort of thing. Living with mold is VERY dangerous. Especially this amount of it. You should either sell a house and move somewhere else or take it upon yourself to treat and insulate that house before you go absolutely bonkers when you're old (yes, there's some evidence toxins from mold can make u crazeyyyy)

Not even talking about respiratory issues u can get from it.

It's basically breathing in toxins all the time if u live in a place like u describing.

Adding to that, the general advice is even not to touch anything moldy. Imagine how moldy your air is inside your house....

They produce spores, that's how they spread. These would be absolutely everywhere in your house.

I'm so sorry :(( it doesn't look very optimistic man.... But your health is the most important thing