greetings, very nice site, glad to have found it

Welcome. The brake light/turn signal issue is very likely the signal switch in the steering column. The first best thing you could buy for that car is a factory service manual. Manuals on cd can be had for cheap.
I could help you diagnose the electrical circuits with a simple test light over the net. Providing instructions you would need to replace that switch over the net isn't practical.
Anyway.... Happy moparing :)