iirc they said you only get 500 points so you can't literally get everything. I dunno though.
Not how the game works, there is no respec. you just start again on the circle you want to switch to, in the end you will have it all, same with the SP, in the end you will have them all.
I still have to figure out a secondary weapon...hmm. Blood magic could be cool but seems too gothy for me. I'll prolly end up with Chaos Magic.