The system on powers is an easy one, you may chose the powers your race starts with and also obtain some others.
Your Sento-Ryoko works like this, if you are a Mage of any type you may only learn spells of your level, even though you may learn all types of Magick (As long as they don't conflict) the Magick you choose to Start with is your title, Like a Fire Mage could have Air spells as well but he would still be Called
Magister Igniti.
For other powers and traits, you make take them at up to a five but not beyond until your Sento-Ryoko goes up.  The amount of experience you get is up to the GM but the way you spend it is up to you, Sento-Ryoko is not automatic, it must be Raised separate from your powers.