who did the soundtrack/composed for the film mentioned in the beginning?
The original score was composed by Carter Burwell, but songs by other artists were used too.
The Big Lebowski
The original score was composed by Carter Burwell, a veteran of all the Coen Brothers' films. 
what is the meaning of the big lebowski It is the name of a film. what is the genre of this film? crime comedy what is the storyline? It charts the events after Jeffrey Lebowski is assaulted as a result of mistaken identity. what are the main characters in this film? Jeffrey "The Dude" Lebowski, the millionaire Jeffrey Lebowski, Walter Sobchak among others who played the first aforementioned role? Jeff Bridges, David Huddleston, John Goodman respectively who is the first mentioned person? He is an American actor, singer, and producer. what was his first screen appearance? Television series "Sea Hunt" did he pursue his career in music too? Yes, he can play the piano, has released an album, has sung for films and also on stage.
wiki:19615564
The Big Lebowski [SEP] Soundtrack
The original score was composed by Carter Burwell, a veteran of all the Coen Brothers' films. While the Coens were writing the screenplay they had Kenny Rogers' "Just Dropped In (to See What Condition My Condition Was in)", the Gipsy Kings' cover of "Hotel California", and several Creedence Clearwater Revival songs in mind. They asked T-Bone Burnett (who would later work with the Coens on "O Brother, Where Art Thou?" and "Inside Llewyn Davis") to pick songs for the soundtrack of the film. They knew that they wanted different genres of music from different times but, as Joel remembers, "T-Bone even came up with some far-out Henry Mancini and Yma Sumac." Burnett was able to secure songs by Kenny Rogers and the Gipsy Kings and also added tracks by Captain Beefheart, Moondog and Bob Dylan's "The Man in Me".