Their beaks are very white, so I think some other breed like Orpington played a part of creating these two. I'm guessing they are females but it is a gamble without knowing their ages and seeing more photos.
First of all, welcome to BYC and congrats are your first flock.
The egg looks fairly normal to me except for the shininess. I am not sure what the cause of that could be, but I think you should post in the medical forum about this. The folks in there are best equipped to advise you on this...
Too soon to say gender just yet. The chick has a yellow beak and looks to have a yellow tinge on the feet, so I am guessing the RIR must have been the father since Bresse and Orpingtons are both white skinned breeds, and wouldn't show yellow. My guess is RIR x Bresse.
I think that's right. The second one could be any brand of red sex link. ISA Brown is one of many.
The third one is something like a Production Blue or Rhode Island Blue. This is another hybrid. Brown eggs.
I'd guess the one outside in the first picture is male, and the one walking out of the coop is female. I'm judging by combs and depth of color in the shoulder area. I could easily be wrong, though.
The rest of them aren't as clear. I'd guess the birds in picture 7 and 8 are females.
By red Colombian I just meant he has the Colombian pattern but with red instead of buff or white. Could he be an olive egger instead of a Brahma? Or maybe there was a mistake in one of the breeding pens? I am not seeing red Brahmas offered by any hatchery.
It appears to be red Colombian. They legs are pinkish white instead of yellow, as Brahmas are supposed to have. I'm not sure what is going on with this bird. Do you know the hatchery?