How much of each does an 84 RX-7 (stock) take?

Motor Oil?
Transmission Oil?
Diffrential Oil?
Coolant?

 

capacities are as follows:

oil (with filter change):
12A: 4.9 quarts
13B: 6.1 quarts

trans oil:
manual trans: 2.1 quarts
auto trans: 6.6 quarts

diff oil:
drum brake rear end: 1.3 quarts
disc brake rear end (to include GSL-SE): 1.7 quarts

cooling system:
10 quarts

 

You would find all of these in the FSM which is stated in the FAQ at the top of the page.