Welcome to the forum.
Yes, the inquisitor does share some similarities with the 'paladin' archetype. Interestingly, there will be an actual Paladin career in book 4 (if I'm lucky enough to get that far!), although it will be very different to what people expect...
As of now, I haven't released any info on special abilities (careers or otherwise). This is for two reasons. Firstly, they wouldn't make a whole lot of sense outside of the context of the book and the rules. Secondly, I think that kind of stuff is fun to 'find out' as you play through the book. And, I'm sure, players will be posting info up on careers and builds once the book is out.