Most of the basic information you need to know about PTO can be found from the PTO menu - Help/Getting Started. Other great sources of information are of course here at the Poker Tracker Forums and other poker forums like:
http://bet-the-pot.com/forum/viewforum.php?f=24
http://forumserver.twoplustwo.com
Note: We highly recommend installing and trying the evaluation version on any Poker Tracker product before purchasing.