How long does it take to die from mold?

From mold on bread, never. Remember than an antibiotic, penicillin, was obtained originally from moldy bread. One caution, this does not apply to moldy rye bread which can cause ergot poisoning. Mold on inanimate surfaces like building interiors depends on the type and extent of mold appearance, but most individuals infected from this are easily treated by oral or injectable courses of antibiotics (assuming they have a normal immune system).