That is unknown, because as of now Firestar is still alive although it is confirmed that he will die in the series Omen Of The Stars. It is speculated that Bramblestar will die, leaving Lionblaze to reign, but nothing has been confirmed.
No, Lionblaze is a warrior. If Firestar dies , Brambleclaw will become ThunderClan's leader. There have been rumors that Brambleclaw will die. But even if he did, Lionblaze could not become deputy yet because he has not mentored an apprentice. I think that Brambleclaw will become Bramblestar soon enough. Hopefully
No, Russetfur does not become leader in the "Warrior Cats" series. She is a respected warrior of ShadowClan but never rises to the position of leader.
His eyes are a deep amber.
One of the mothers nursing the warrior cats is Goldenflower. She is the mother of Brambleclaw, Tawnypelt, and three other unnamed kits.
No, SqurrielFlight and BrambleClaw never has kits, but SqurrielFlight takes care of her sister, LeafPool's, Kits; HollyKit, LionKit, and JayKit, Because LeafPool was a medicine cat when she had her kits in the forest with CrowFeather of WindClan.
Firestar
It is likely that Brambleclaw will become leader after Firestar since Brambleclaw is currently the deputy. However, anything is possible.Some possibilities for the new leader include:BrambleclawCinderheartLionblazeDovepawGraystripeCloudtailThere are many other possibilities as well.Answer to above answer:It has already been confirmed that Brambleclaw nor Greystripe will become leader after Firestar.Another thing that I have noticed is that Erin Hunter never uses the same leader name twice. Example: The leader of Skyclan when they were forced to leave the forest was named Cloudstar, so Cloudtail well not become leader after firestar dies.Lionblaze becoming clan leader is a posibility, and so is Cinderheart.Also I know people keep asking is 'how many lives does firestar have left?'He has 2 lives left at the end of fading echos, the second book of omen of the stars.It has also been confirmed that Firestar is going to die at the end of the fourth series.
In the Warrior Cats series, they receive nine.
A bunch of Warriors do, but I'll give you two well known cats. Brambleclaw Leafpool Hope this helps!
Hawkfrost dies in the book "Sunset" in the Warrior Cats series by Erin Hunter. He is killed by Brambleclaw during a battle.
Tigerstar wanted Hawkfrost to lead RiverClan and Shadowclan combine and Brambleclaw to lead Thunderclan and Windclan combined. Obviously this was never fulfilled: Hawkfrost is dead, and Brambleclaw is just an ambitiously loyal deputy of Thunderclan.
It's hard to say for each individual cat. However, the voices should be like the characters. For example, Brambleclaw is a strong cat and can be cold and nice. For Brambleclaw's voice, it would be better if an actor that can copy Brambleclaw's personality and to embody it than to have a softer actor.