1. "No.1 scholar" was qualified as an official. As for how big an official he is, it depends on the emperor's preferences and the situation at that time. Of course, the general champion will not be a small official like a county magistrate. The top three are all going to the Hanlin Academy, and they are generally awarded to seven-product editors. If the emperor likes the number one scholar, it will be even higher. The emperor's reward also varies from person to person. Gold, satin and a trip to Beijing.
If you win the first prize, at least you can prove that you are knowledgeable. So many people will come to curry favor with you, send gold and silver jewelry, send horizontal batches, and have everything. This is completely consistent with Jin Fan's record in the novel The Scholars.
After winning the first prize, I only got a title, which is equivalent to the recognition of knowledge. However, there is no explicit provision for the actual material reward, which also depends on the mood of the emperor at that time to some extent.