Everything you have listed can be fairly easily achieved, except for one: The hybrid classes.
The others involve changing values in the database and using the various 3rd party tools. You'll have to play around with your own server to figure these out.
The hybrid classes would require a fair amount of coding experience, but it can be done. The level of difficulty involved for it is not something that can be taught from a "Learn XYZ in 21 Days" type book. Basically, if you're capable of doing it, you wouldn't be asking how :P
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