Questions

4 eyes.

Here in the question, it is asked how many Eyes We have so that means here the person who has asked the question is also including the person who is suppose to give the answer. In a clear understanding, the Conversation is happening between 2 people 1st who asked the question and 2nd to whom it has been asked, which means there are 4 eyes.

From all the hints given, 

only 042 satisfies and it unlocks the key.

How ?

7*6 = 4 2
9*9 = 8 1
5*3 = 1 5
6*2 = 1 2

The hands of a clock point in opposite directions (in the same straight line) 11 times in every 12 hours. (Because between 5 and 7 they point in opposite directions at 6 o'clcok only).

So, in a day, the hands point in the opposite directions 22 times.

Microsoft Word or MS-Word is an Application software developed by the company Microsoft. It allows users to Type and Save documents.