How to config I/O pin

Please help, How i Disable all features of PIC18F4550 & 2550 (eg. A/D, internal OSC, USB...)
I mean i want to make all pins as Input/Output and use crystal.

Thanks

Datasheet AND a search within the forum are the greatest place to learn
TRISA, TRISB, TRISC... to tell if an i/o is set to Input or Output
etc
etc
etc
In the FAQ, you'll find a thread about the Configuration fuses settings