Mousefur is very old. She was first mentioned as a kit in Bluestar's Prophecy.
No, as far as we know Longtail did not have a mate, and Mousefur never had kits.
unknown yellow or amber
No, Mousefur never had any kits in the Warriors series. She was unable to have kits due to infertility.
Thornclaw and Spiderleg.
Thornclaw. Then Spiderleg.
One-eye and Halftail
Mousefur never officially mates with any cat in ThunderClan. She remains single throughout her life in the series.
Mousefur's mother is One-eye.
yes they are brother and sister
Well, she never had one. She's an elder right now, too. So it would be weird to mate one while you're really old.
Mousefur, Brindleface, Brambleclaw, etc........
Mousefur is a skinny, think-furred, small, dusky brown she-cat with a graying head and she is from ThunderClan. You can find more description of the characters at this website, http://warriors.wikia.com/wiki/Warriors_Wiki.