Short answers, pulled from the story.
The 1889 Paris Exposition Universelle attracted 32,250,297 visitors during its run from the 6th of May to the 31st of October, 1889. The fair also drew 61,722 official exhibitors, of whom 25,000 came from outside France.
Ten European governments boycotted the 1889 Paris Exposition because its theme commemorated the centennial of the French Revolution and the overthrow of the French monarchy. The boycotting nations included Germany, Austria-Hungary, the United Kingdom, Italy, Russia, and Sweden. Despite the official positions, many citizens and companies from those countries participated through private funding.
The Eiffel Tower was built by the firm of Gustave Eiffel using 500 workers who assembled 18,000 iron pieces made at a factory in Levallois-Perret. The structural design was created by engineers Maurice Koechlin and Emile Nouguier, who received the patent along with Eiffel. The architect Stephen Sauvestre designed the tower's curving exterior, and construction lasted two years, two months, and five days.
The village negre was a section of the colonial exhibition at Les Invalides where 400 people from French colonies were displayed in recreated village settings for visitors to observe. Samba Lawbe Thiam, a Senegalese jeweler who participated, described the experience as humiliating and said the mud huts misrepresented a Senegal that had railways, electric lighting, and modern buildings.
Claude Debussy first heard Javanese gamelan music at the 1889 Paris Exposition, performed by an ensemble from Java, and the encounter influenced some of his later compositions. Nikolai Rimsky-Korsakov conducted concerts of Russian music by the Mighty Five at the exposition, introducing that repertoire to Parisian audiences. Jules Massenet's opera Esclarmonde received its world premiere at the Opera Comique on the 14th of May, 1889, with American soprano Sybil Sanderson in the lead role.
The 1889 Paris Exposition Universelle made a profit. Receipts reached 49,500,000 francs against costs of 41,500,000 francs. It was the last Paris world's fair to finish with more income than expenses.