Living in a sub-tropical and very humid climate gives you a real challenge to keep mold away. Many folks use bleach water and a stiff brush to get rid of it and some even use vinegar on it. For outdoor mold a power sprayer is very efficient.
Once you clean it up you will need lots of ventilation and as much sunshine as you can get into the house.
We are happy to have you and, if you have some more specific questions about mold or any other DIY subject, just give us a shout.