Please help who ever can

my friend has a 13 year old son. she is very worried because she found inappropriate pictures of nude girls etc in his possession. he goes into inappropriate web sites also. he is very intelligent and manipulative. when very young, he had to get whatever he wanted or else he used to cry, stomp with the feet with feet with frustration, etc. (from 1 to 3 years) later, he started to hide people's things if he were angry at them (for a reprimand or denial of something he wanted, etc) he that was like 7 years old or so. except crying and fussing, he never lied or manipulatie until like wjen he was 6 or so. he likes cold things, and cannot tolerate heat..has to take his shirt off. even when he is sick with cold and fever, demands for ice cold drinks, which sometimes lead to terrible coughs, and pain in the throat, or tonsil problem. now he lies very casually if confronted for something and does not bat a lid. but if he is not guily, he would feel very angry and sad for unjust blaming and breaks down into tears. he has an angry temparment, cannot wait for his wish to be gratified. has no patience. he is extrememly intelligent in manipulating, getting into bad company, very athletic in body, but tendency for obesity due to sedentary stlye. excercise does good to him, but he is lazy. not much endurance for running etc, probably asthamatic tendency because he gets a little breathless. chese does not suit him, but wants it. can we treat him for his mind habits of lying and procrastinating, and ADHD. he was ginev Tub, Slf, and Lyc. family history of diabtes, ADD, ADHD etc. very dissatisfied and wants to have good things in life like his friernds who are well off.
i think i gave most of the symptoms. my friend is single and is very worried. please help. thank you in advance.