Birchfall is their father-
Dovewing- a gray she-cat with green eyes- involved in the prophecy "there will be three, kin of your kin, who will hold the power of the stars in their paws"- her power is to see and hear farther than any cat.
Ivypool- a pale silver-and-white tabby with dark blue eyes, currently aware of Dovewing in the prophecy, and is a spy pretending to train in the Dark Forest.
yeswell.... the fourth apprentice isn't released yet so we don't know for sure...
Brightheart is
well, we know that either ivykit or dovekit will become the third cat instead, right? But it says the FOURTH apprentice, so I bet a new prophecy will announce that both of whitewings kits will become part of the prophecy, and there will be four.
No, she has kits with fireheart.
Brambleclaw has no kits biologically, since it has been revealed that Squirrelflight did not bear him kits; instead, the kits were her sister Leafpool's. However, his adopted kits (the aforementioned kits) would be Jayfeather, Lionblaze, and Hollyleaf (presumed deceased).
Spiderleg has three kits named Rosepetal, Toadstep, and Daisypetal.
Dovewing and Foxleap do not have kits together, nor become mates.
Dovekit (new one!!) and Ivykit. If I'm correct they look like: Ivykit: A tabby and white she-cat with green eyes daughter of Whitewing and Birchfall sister of Ivykit. Dovekit: Fluffy gray she-cat with green eyes daughter of Whitewing and Birchfall sister of Ivykit.It is said that one of them may be one of The Three because Hollyleaf wasn't.
Moonflower's kits are Bluestar and Snowfur.
No, he doesn't have any kits.
Who are Fire Stars kits
As of yet, Lionblaze has no kits.