Short answers, pulled from the story.
François Mitterrand was President of France from 1981 to 1995. He was the longest-serving president in the history of the Fifth Republic and the first left-wing politician to hold the office under that constitutional framework.
Mitterrand worked as a mid-level functionary in the Vichy government from 1942, handling POW affairs, and received the Order of the Francisque, Vichy's honorific distinction. Historians have called him a "Vichysto-résistant," as he simultaneously built a resistance network from 1942 onward and the 28th of May 1943 is generally taken as the date he broke fully with Vichy.
In his first term, Mitterrand abolished the death penalty via the Badinter Act, cut the working week to 39 hours, raised the minimum wage by 10%, and authorised France's first private television channel, Canal+. He also equalised the age of consent for homosexual and heterosexual relationships and launched a major decentralisation of government through the Defferre Act.
In July 1985, French agents sank the Greenpeace vessel Rainbow Warrior while it was docked in Auckland, New Zealand, killing one Greenpeace member. The scandal led to the resignation of Defence Minister Charles Hernu and required France to pay $8.16 million in damages to Greenpeace, NZ$13 million to the New Zealand government, and a further sum to the deceased's family.
Mitterrand and German Chancellor Helmut Kohl jointly advanced the Maastricht Treaty, signed on the 7th of February 1992 and approved by just over 51% of French voters in a referendum. Mitterrand also made French agreement to German reunification conditional on Germany abandoning the Deutsche Mark and adopting a common European currency, a deal Kohl accepted.
In June 1990, Mitterrand used a speech at La Baule to tie French development aid to democratic progress in former French colonies, calling for free elections, multipartyism, press freedom, and an independent judiciary. He also announced that the least developed countries would receive grants rather than loans and capped interest rates on French loans to intermediate-income countries at 5%.