Bruce Wayne is the son of Dr. Thomas Wayne and his wife Martha, two very wealthy and charitable Gotham City socialites. read more
The answer is ridiculously simple : He was scared of bats, and to be a fearless crime-fighter, well, you shouldn't have any fears. He chose the bat symbol to overcome his fear and give him strength. read more
After his parents died and he went through training, he needed something that would strike fear into the hearts of criminals. On his first night out, he did not have a costume but simply wore regular clothes. He dragged his almost lifeless body back to the living room of his mansion. read more