The bigger one outside we call them agama lizard, I live in west Africa and you will commonly see this types of lizards around houses, for the wall gecko it can be poisonous if it enters your food or soups and their poos are harmful also, but they have their own importance in the house because they get rid of insects on the walls, and they are always at the side of the house that has bright lights, sometimes you can’t completely eradicate them because they tend to deliver new offsprings. We just find a way to be careful with them most times but they seem very harmless.