Where can a 15 years old guy get a part time job in Fremont, CA?

I have a friend who is 15 and he is gonna be 16 next month. And he lives in Fremont, CA. His family's income is not too much. So he is willing to do part time job for his pocket money. He asked me where he can get but i also don't know where is hiring. Therefore can anyone tell me where he can get a part time job in Fremont, CA. By the way, does he need a work permit from his school?