1) Yes, if it remained new, unused, and has market value.
2) You can, but you still need to pay the khoms.
3) If you gave them a way in the same year, no need to pay khoms.
4) If it is not going to be used again, then yes.
6& 7) If you dispensed with these clothes, and from this gold, in the same year of purchase, that is, you will not use them again, then the khoms must be paid in its current value.
And if you are saving it, and you will use it in the future, then the khoms is not obligatory.