I own a 1984 nissan 300zx
i dont know much about cars but im learning

1.
it leeks oil when its running and leeks till the engine has cooled down after its turned off.

2.
tail lights never turn on unless brake is applied.

3.
speed gauge bounces around like a pin ball game.

4.
headlights wont raise electronically had to crank them up. on closer inspectionthe rubber tubes attached to the pump or whatever they are lead no where. i guess there completely disconected.

5. e-brake doesnt work at all. can see its not hooked up.

6. oil pressure gauge doesnt work.
even before i had problem #1

if you can help me with any of my questions it would be very helpful.

7. should i just go to a mechanic with this.
i think i may be in over my head.