I think it's more likely that while Quirrell wants Harry to be dependent on him for information, he also doesn't plan on telling him very much. He's keeping Harry away from people who are (relatively) easy to manipulate (see: McGonagall just took Harry at his word and undid his Time Turner lock), and making sure that he's the one with a final say as to what Harry does and does not know.

Insofar as he can, anyway. We'll see how well that works. Quirrell's deflection w.r.t. spell creation was sufficiently obvious that Harry's probably noticed, which in turn means that he'll be making his own plans.