nope
Yes, the word tux is accepted in scrabble.
No.
It depends on the position on the board, but with no blanks and no bonuses, it would be 14 pts. (s=1, c=3, r=1, a=1, b=3, l=1, e=1)
The word "scrabble" means "to scratch, claw, or grope about frantically." In the board game, players usually move the tiles frantically across their rack in an attempt to make a play on the board....