pullet means a teenage female chicken. and legbar is a breed of chicken. the second one is shy? she is probably a girl then. girls are usually shy. and yes, males usually cock their heads sideways to look at you. like this-
meanwhile, girls look up at you.
and you are right about the third pic...
first one...yes. it looks like a legbar pullet.
2nd one...not sure. How does it look at you? does it cock it's head, or just look straight up?
in the last pic...the larger one looks like a male, and the littler one looks like a female.
~good luck!