Mr Mandela is often referred to as âKhuluâ, which means great, paramount, grand. The speaker means âGreat Oneâ when referring to Mr Mandela in this way. It is also a shortened form of the isiXhosa word âTat'omkhuluâ for âgrandfatherâ.
I assume 'Pico' is a name. Boku refers to oneself (like 'watashi', 'ore', 'washi', etc.) like 'I' and 'no' indicates possession (for example, 'boku no inu' would be 'my dog' or 'dog of mine' (in reverse order since dog appears at the end in the Japanese sentence) since 'inu' is dog in Japanese).
Goku is a warrior that is pure of heart. When he was just a child, he was sent to Earth to destroy all life on the planet. He hit his head when he was a child and lost all memory of his mission. From that day on he became a good boy. He fights for the sake of the Earth...and even for fun! Gohan.