I'm a little unclear of what the actual question is. Are you asking how to use the PIC's internal timers? How to use the timers would vary based on your application. The PIC's timer modules can be configured as either timers or counters based on a few different internal sources (at varying speeds) as well as external sources.
If you are interested in using the timer modules I would suggest you start by reading the data sheet on the PIC micro timer modules and then reviewing
Kevin's interrupt/timer code from 2005 (he hasn't posted 2006 code yet).
Once you've reviewed the above items you should have a better idea of what you are looking for, or where you may need some assistance.