I realize this question may have already been answered by another Admin, but if you are still wondering, here you go:
First, unfortunately no, you must still ask before adding those abilities to your profile.
Second, not at the moment.
Third....sure.
Fourth- Say the kido you want to perform's standard cost is 10 sp. If you have the Ultimate Mastery perk (Kido Intelligence 100), you can simply add 20sp to the standard cost of any kido, making it that much more powerful. In the above case, you would be tripling the base cost of the Kido.