The Diyah in beating someone in the face when blackened is six golden dinars. If the face becomes green then it is three dinars. If it becomes red then it is 1.5 dinar. Each dinar is equivalent to 4.25 grams of gold. If the beating was on other than the face, like the hand, leg and foot, or chest then it is half of what is mentioned. If it was on the head then there are various cases with different rulings for the Diyah. All the cases and their rulings are mentioned in details in the book of practical laws.
The temporary marriage is not valid if the actual contract was not pronounced.
Such condition in the marriage contact is invalid but it does not invalidate the marriage contact. Yes, if the wife puts a condition in the marriage contract that she will be his agent in divorcing herself in such a way that she cannot be discharged from such appointment and the husband agreed to this, then she can divorce herself on behalf of her husband.
No, one does not need to perform wudhu in order to touch the translation of the Quran.