Weak about 1 teaspoon of coffee per person, per cup, or for strong(er) coffee use 1 and 1/2 to 2 teaspoons of coffee per person per cup.
alot
6 oz or 1 1/2 sticks
It is 0.624999999 of a cup. i would suggest table spoons which is 9.999999999 which you could probably round off to 10 table spoons. If you don't have a table spoon, use a big spoon but not a giant...
2 cups