What's the average amount someone has to pay for taxes in California &what are taxes?

-I'm just curious :P I wouldn't know yet, I'm 15. But assuming the average income is $30,000 and the person is a homeowner & car owner, about how much is the average amount a person would have to pay for taxes?

And, what are people taxed on? XD I'm a bit confused about taxes.there is no average

the person earning $30000 may be married with children, he also may have enough to itemize and reduce his taxes

the car is a personal thing unless he is r'qrd to use it for work, and will not affect his taxes

the lowest rate in Calif. is 1.25 and rises to 9.55%