The answer depends on "before what".
yes lots of space probes
The Voyager I and the Voyager II are the only space probes to visit Neptune. They landed in the 1980s.
Semi-autonomous space probes have gone to the vicinity of Neptune, but no robots in the popular sense.
no not yet
yes,because there were space-probes and unnamed crafts that found Venus dust-covered and windy
yes lots of space probes
The Voyager I and the Voyager II are the only space probes to visit Neptune. They landed in the 1980s.
Semi-autonomous space probes have gone to the vicinity of Neptune, but no robots in the popular sense.
yes
No the far lest a probe as landed was Saturn
no
yes
Rovers are a type of space probe. Space probes are any robotic mechanism sent out of Earth's atmosphere to explore and gather information.
Yes, many of them are. In fact, both of the Voyager probes are still transmitting data, even from beyond Neptune and past the "heliopause", the boundary between the solar system and interstallar space.
no not yet
As far as we know, no human being has ever been farther from Earth than the moon. All space probes to any other planet have been unmanned. Space probes are automatic and are programmed to send scientific data such as images and readings back to Earth. The human race currently do not have the technology for man to survive long periods of space flight. Space shuttles have enough problems getting into our own orbit, let alone further than our own orbit. It would take years to reach Neptune.
yes,because there were space-probes and unnamed crafts that found Venus dust-covered and windy