kuririn was born without a nose. it's just... natural? heh. Toriyama is know for his weird quirks in his stories.
About the eyes. The images you put up do no coincide because one is from the anime, and one is from the manga. And of course, the white one is from the manga.
Toriyama didn't do a TON of colored DB pictures since most of the comic is b/w. But I'll bw willing to bet, most or all of HIS colored drawings (you can usually see the brush & pen strokes) Kuririn's eyes will be white..
As for connecting his eyebrows to his eyes..the charaters eyebrows do overlap (like vegeta in your sig) and my models eyebrows do to (from the front) and I can pull them back from the side and get them closer, but they make the shape of the head very angular and the model loses a lot of depth.
I'm begining to see the limitations of 3D modeling when trying to re-create 2D art. This is one of the charms of 2D... things don't HAVE to stay perfectly relative. What might be seen as inconsistant, acctually makes the characters look better. In the case of Kuririn's eyes, ears (fish-ness) I cannot perfectly create the character from all angles. Take a look at any DBZ figure out there. most all of them (that are sculped well) have that distance between the eye & the eyebrow from the side, Others only have the eyebrow, but no depth to the ridge and shape of the eye. DBZ was designed in 2-D FOR 2-D. I did the best I can, and I'm pretty happy with it, but I will probably try to tweek a little more before I finalize everything.