By the kind of question you've asked, it looks like you're not too experienced with PICs. Yes, 16F877 is fine, if you checked you'd discover it has a PORTB and if you look at the Datasheet (which you can freely download from the Microchip website - and is a MUST!!!) you will discover that PORTB on that PIC also has pull-up's. All a pull-up is, is a Resistor internal to the PIC, which you can program the PIC to switch-in if you need it. That Resistor connects between the relevant PIC pin and Vdd (+ve supply rail) pulling that pin up to +ve (hence the name). Just saves you having to provide one externally.