Well PPc have changed over the years and for the worse if you ask me, and I personally wouldn't bother with it..but if you must..then do keyword search and go after low traffic keywords..
PPC means pay per click as i know. if thats what you mean, there are many networks offer ppc campaign. google adwords for example.
This question should be started at PPC advertising section PPC is good way to generate traffic but you gotta pay for it