I think I have bricked my MacBook Pro, what are my options to get it fixed?
Take it to an Apple Store (make an appointment first): they'll examine and diagnose it for you with no charge, and then tell you what they'd charge to fix it. 

Doesn't cost you anything and if the price is too great or you'd rather fix it yourself (now that you know the problem) then you can simply decline the service. It's a no-pressure deal, and one of the primary reasons I recommend Macs.