dafuqisbridgeport

I just picked up a 86 NA RX7 and from what im getting from my friend its a sold steal for the price I got. just has a couple little problems that we are working out, but im excited to finally be up and running now.
Problems:
don't know how to change the upshift light?
engine bogs down when at full throttle (we think because of bad gas messing with the injectors)
temp gauge, oil pressure gauge work intermittently and the warning light cluster seems to be fried.

I am very open to any tips or advice anyone might have.