2002 Beetle brake lights dont work, epc light, and engine light on :(

I recently purchased a beetle and am having problems with it. I cannot figure kjust for the life of me what is wrong with it. I have replaced my brakeswitch in the car and checked all my fuses but my brake lights still dont wirk. My passenger side headlight also blew and so has my passenger side blinker. I also have a xheck engine light on, an epc light and the radio in my car doesnt work. Help!!#