Short answers, pulled from the story.
Marvel Studios announced the film in October 2014 with Anthony and Joe Russo signing on as directors in April 2015. Filming began on the 23rd of January 2017 at Pinewood Atlanta Studios and concluded on the 14th of July 2017.
Thanos acquires the Power Stone from Xandar and kills Loki before sending Hulk to Earth. He kidnaps Gamora to learn the location of the Soul Stone on Vormir and sacrifices her to obtain it. The villain completes the Infinity Gauntlet and snaps his fingers to eliminate half of all life across the universe.
The estimated budget ranged between $325 million and $400 million making it one of the most expensive films ever produced. The worldwide total reached $2.052 billion while Deadline Hollywood calculated a net profit of $500 million after accounting for costs.
Hollywood Records released regular and deluxe soundtrack albums digitally on the 27th of April 2018 with physical releases following on May 18. Alan Silvestri composed the score from January 2018 to late March.
Chris Hemsworth plays Thor while Mark Ruffalo portrays Bruce Banner and Josh Brolin voices Thanos using motion capture. Tom Holland appears as Peter Parker and Chadwick Boseman stars as T'Challa alongside Benedict Wong who serves as a Master of the Mystic Arts.