Open Question: My boss is a bit of a ‘pervert’, 15 year old, really needs help :/?

So i have a saturday job, and have held it down for 1 and 1/2 years (not alot of 15 year olds can say that! )
Its in a butchers/deli/farm-shop. Recently, my boss has treated me pretty badly. He doesn’t even acknowledge when i walk into the door, shouts at me if i ask ‘pardon’ (he mumbles – ALL THE TIME!), throws things at me if i put the wrong thing in the counter? Its getting pretty unacceptable. The boy who used to work on a Sunday was fired a few weeks back, he was really sweet. And has said to me that my boss has made a few comments on my appearance :/ basically saying i look good, but in a crude way. ‘Josh’ also said that e makes comments on young girls/women that come into the shop. I go on to his office computor to order a few things for the business (e.g aprons, rusk, sausage skins…) and his web history has things like…
‘benaughty.com’ ‘lucysescorts’ < i checked that out at home and its basically women up for prostitution. Baring in mind he has a daughter my age, 3 other children and a lovely wife.
I don't know what to do, it feels uncomfortable, i don't feel too safe, BUT I NEEEEED THE MONEY! So bad :/ and its hard to find a job. He goes through staff so quick, and at 15 years of age, i am the longest working employee there.
I work for below minimum wage, and get a 10-15 minute break for 8 hours :/
i don't go searching through his computor, whilst i tyoe google into the seach/web box it comes up that he's searched 'lucys escorts'. And being under minimum wage, means he's employing illegally.
To the knife suggestion, its a butchers, i have use of the cleaver HAHA.