What you described here is the classic game of dice.
Question 1: Altogether, there are 36 possible combinations.
Question 2: regarding pairs with a total of 10 or more points,
10 can be made 3 ways = cube 1 = 4 cube 2 = 6
cube 1 = 5 cube 2 = 5
cube 1 = 6 cube 2 = 4
11 can be made 2 ways = cube 1 = 5 cube 2 = 6
cube 1 = 6 cube 2 = 5
12 can be made 1 way = cube 1 = 6 cube 2 = 6