PTs (points) are your stats in RF. There is no agility, dexterity, vitality, strength, or any of that stuff you've dealt with in other MMOs. Instead you get Melee, Ranged, Defense, Shield, Force, and your race's specific PTs.

If you play Accretia, you will have Launcher skill instead of Force. If you're Bellato or Cora, you will get Force, as well as another race PT. For Bellato, you'll get UNIT PT which is of course for training your MAU (Massive Armor Unit). For Cora, you'll get Summon PT which is for training your summons. PTs determine your strength in a skill, what armor you can wear, and how many hitpoints and force points you have. Level 19 melee armor, for instance, will have a requirement of 10 melee PT to equip. This applies to all armor types (long range, close range, launcher, and force).

The use of PTs, and how to level them: Since melee PT is the easiest to explain, we'll use it as an example. When you begin a new character, the weapons available to you (before you make RF Online Gold/level up) will be decided by your choice of class. We'll assume you chose a Cora warrior. You will be given a choice then of multiple one-handed or two-handed weapons. It is wisest at this point to choose a two-handed weapons since the earliest shield can be worn at level 4, and you will have many opportunities to grab other one-handed and shield items before then.

So now you head out to do your first quest, which will involve killing some monsters, and obtaining a couple of levels. At this point there is little to do for leveling PTs. You kill the mobs you need, pick up loot and save what you may think valuable to your character later, and move along. Fast-forward to level 7. By now, you're wearing your second set of armor, and you've decided that a one-handed weapon and a shield is the choice for you. You've also noticed that as you hit a monster, you gain melee PT, as well as gaining defense PT as a monster hits you. Further more, if you've worn a shield for a few levels now, you're bound to have blocked a few attacks, and seen that you get shield PT for that.

At lower levels(RF Online Gold), you will easily out-level your PT caps. There is one and only one solution to this problem. You'll need to use an under-powered weapon, and attack lower level creatures so that your PT will raise, but you will get less experience for each kill. At low level, the amount your PTs raise based on the level of mob you kill is minimal, so killing the lowest level mob that will give you skillups is the best idea.