Anybody know where I can start with this datsun B210 and all of its problems?

my car is running inconsistently, and it is progressively getting worse. It bucks
randomly (sometimes quite violently) while I am driving, without any sort of
transition in the driving method (such as switching gears, slowing down and
speeding up, etc.). It also has a tendency to act as if its starved for fuel, and
occasionally when its really acting up, the more gas I try to give it, the more it
will choke. And to top it off, just today the gas pedal stopped catching, so my
car will be trying to start, and despite trying to rev the engine, the gas just
doesn't reach that far or something. In short, my car is a hot mess.