New Tau army, not sure wysiwyg

I dug out my old Tau army I had partially painter and amassed from a decade ago joebthat I have a friend who'll play, but I'm not sure exactly what I have. Any assistance would be greatly appreciated! For the Greater Good.

I think the first group are Pathfinders, 3 with railguns but not sure about the one with the binoculars. 2nd and 3rd are crisis suits? I don't know what the armament is. 4th is a ethereal with 1 arm, which I lost. Can I add a warhammer guy with swords arm instead? Lastly are breechers I guess, but three different loadouts. Not sure what is what. Thank you!