It is impossible to know. Yue is the same age as Kero. They were both made my Clow Leed (Reed - in the English version) "a few thousand years ago". If you are refering to his "disguise" Yukito Tsukishiro (Jullian Star - in English version), then Yukito is as old as the brother of Sakura -- 17 in the first part of the series.
CLAMP are a group of manga artists who created many famous manga series like Chobits and Tsubasa RESERVoir CHRoNiCLE. They also made Cardcaptor Sakura, RG Veda, Magic Knight Rayearth, XxxHolic, Kobato and some others.
There isn't an episode of Naruto kissing Sakura. There is a lot of fan-fiction with the two together but nothing has been made official.
A transformation has been made on the graph. A translation has been made.
A mistake has been made
When Naruto left the village Ino asked Sakura to teach her. Over the next three years the grew more friendly toward one another. Ino and Sakura still have a somewhat strained relationship, but are friends. (Sakura's brutal training made Ino mad though)
Ayako Sakura has: Performed in "Ryokushibyo" in 1924. Performed in "Umi" in 1924. Performed in "Saigo no ippei made" in 1925. Performed in "Notoi no fue" in 1925. Played Nakajima Mitsu in "Akunin de atta kare" in 1926.
Sakura Hime Kaden
Unknown
The Volume 34 has been released, but no translation has been made so far (2009-01-01).
Ino is Sakura's best friend but they stopped being friends because they became love rivals, but since Shippuden started I think they made up.
Hmm... Anything that involves Koge Donbo. The mangaka's works are absolutely kawaii! And I'm pretty sure that a lot of her works are made into animes. Others are Dokuro-chan. She may be cute, but she certainly can kill you! Azumanga Daioh, Fruits Basket, Lucky Star, Tokyo Mew Mew, Cardcaptor Sakura, Bottle Fairy, Shugo Chara, and Sugar: A Little Snow Fairy. That's it, for now.