Do we need to learn to 'think' or is it an ability that we are born with? By 'think' I mean neurons firing in a certain way to provide useful information (although since I am not strong in this subject, this may make no sense).
Allow us to include within the term "learning" the absorption of information, which contributes to creation of neural pathways within the brain. Admittedly, this is a rather liberal use of the term, "learning".
Human thought is an emergent behavior of the brain, which begins once sufficient neural pathways have formed. Therefore, we "learn" before we think, and such learning allows the brain to follow its natural course in creating the emergent behavior of thinking. This is very subtly different from saying that we "learn to think".
That is obviously depends on how one defines learning and thinking.
We need to learn how to walk, but do you know of any non-handicap 6 year old who didn't manage to?
Similarly, newborns' nervous system in neither fully 'formed' nor in full swing (for a very good reason), so they aren't exactly thinking like an adult and they need, at least, some stimuli to develop such ability - but again, show me a non-handicap adult who doesn't think.
Thinking in itself can be defined in different ways, involve levels and abilities.
I guess you can say that learning (a change in behaviour or beliefs) is a necessity for thinking, but it isn't voluntary - we are pretty much biologically destined to think, and in normal circumstances can't help it.
So if I understand you question alright, it is an innate ability.