Images

is there a function that allows the image to be enlarged when it is clicked upon?

is there a way to put information on a user's profile that they can read but no other member can read?

is there a function that allows the image to be enlarged when it is clicked upon?

Like in a lightbox or modal window? Yes, CB Gallery. If you mean for image fields/avatar then no you'd need a 3rd party extension for that or custom jQuery added using CB Auto Actions.

is there a way to put information on a user's profile that they can read but no other member can read?

Yes, CB Privacy can do this.