First of all, thanks for taking the time to look at my post. 
And here it goes. Here they are at a few days old. The three dark ones hatched out of green/blue eggs. There are all some kind of a cream crested leg bar cross (don't think neither of them are pure breds). After reading up on it, I understand that the one on the far top left, should be a pullet and the one in the back middle should be a roo, due to the spots on there heads. Going on from that presumption, I believe the black on is a roo, too?
I am completely clueless on the two yellowish chicks. I am uncertain of the breed, but they both hatched from white eggs.
1.
And here they are today (5 weeks old). According to me the two on the right are roos and the one on the left is a pullet? The confusing thing is that the "pullet" seems to be the biggest one!
2.
Pullet now on the right and roos on the left? I really wish the black one would be a pullet, but I don't think it is. Any opinions?
3.
Roos in the front, pullet far left in the background? As you can see there is quite some difference in the combs. Would it be possible for the light coloured one to be a pullet? If yes, why would he have had a white spot on him at birth?
4.
Anyway, I am in particular interested in the yellow/light brown chicks. There is a huge different in coloration and the darker one seems to have different coloured ends on his feathers, looking slightly speckled. Any clues on the breed? The other chick is just lighter all over and does not seem to have feathered as well.
Any clues or pointers would be very much appreciated. What breed and do they look like roosters or pullets to you?
Thanks.
5.
Colour comparison of the two yellow chicks.
6.
Colour comparison of the three dark chicks.
7.
Sorry about the picture overload, hope somebody can give me some clues and confirm or oppose my guesses.
Thank you so much.
Your clueless chook27
p.s.: Numbered the pictures for easy referencing.

And here it goes. Here they are at a few days old. The three dark ones hatched out of green/blue eggs. There are all some kind of a cream crested leg bar cross (don't think neither of them are pure breds). After reading up on it, I understand that the one on the far top left, should be a pullet and the one in the back middle should be a roo, due to the spots on there heads. Going on from that presumption, I believe the black on is a roo, too?
I am completely clueless on the two yellowish chicks. I am uncertain of the breed, but they both hatched from white eggs.
1.
And here they are today (5 weeks old). According to me the two on the right are roos and the one on the left is a pullet? The confusing thing is that the "pullet" seems to be the biggest one!
2.
Pullet now on the right and roos on the left? I really wish the black one would be a pullet, but I don't think it is. Any opinions?
3.
Roos in the front, pullet far left in the background? As you can see there is quite some difference in the combs. Would it be possible for the light coloured one to be a pullet? If yes, why would he have had a white spot on him at birth?
4.
Anyway, I am in particular interested in the yellow/light brown chicks. There is a huge different in coloration and the darker one seems to have different coloured ends on his feathers, looking slightly speckled. Any clues on the breed? The other chick is just lighter all over and does not seem to have feathered as well.
Any clues or pointers would be very much appreciated. What breed and do they look like roosters or pullets to you?
Thanks.
5.
Colour comparison of the two yellow chicks.
6.
Colour comparison of the three dark chicks.
7.
Sorry about the picture overload, hope somebody can give me some clues and confirm or oppose my guesses.
Thank you so much.
Your clueless chook27

p.s.: Numbered the pictures for easy referencing.