Question: Which studio produced the original 1995 movie for the film franchise on which Lego Toy Story was based on?

Context paragraphs:
Buzz Lightyear: Buzz Lightyear is a fictional character in the "Toy Story" franchise.  He is a toy space ranger hero according to the movies and action figure in the "Toy Story" franchise.  Along with Woody, he is one of the two lead characters in all three "Toy Story" movies.  He also appeared in the movie "" and the television series spin-off "Buzz Lightyear of Star Command", as well as the two film sequels.

Partysaurus Rex: Toy Story Toons: Partysaurus Rex is a 2012 Pixar computer animated short film directed by Mark Walsh.  It was first screened in theaters ahead of the 3-D theatrical re-release of "Finding Nemo".  "Partysaurus Rex" is the third short in the "Toy Story Toons" series, based on the characters from the "Toy Story" feature films.  The short involves Rex getting left in the bathroom and making friends with bath toys.  It is one of the final roles of Don Rickles as Mr. Potato Head, before his passing in 2017, followed by "Toy Story of Terror! ", "Toy Story That Time Forgot" and "Toy Story 4".

List of Toy Story characters: This is a list of characters from Disney/Pixar's "Toy Story" franchise which consists of the animated films "Toy Story" (1995), "Toy Story 2" (1999), and "Toy Story 3" (2010) and the animated short films.

Toy Story Land: Toy Story" Land (known as Toy Story" Playland at Walt Disney Studios Park) is a themed land at Walt Disney Studios Park, Hong Kong Disneyland, and soon-to-be at Disney's Hollywood Studios and Shanghai Disneyland Park.  The area is based on the Disney·Pixar film series, "Toy Story".  In France, it is part of Toon Studio and opened on August 17, 2010 at a cost of 79 million euros.  In Hong Kong, "Toy Story" Land opened on November 18, 2011.  A version of "Toy Story" Land for Disney's Hollywood Studios was announced on August 15, 2015 at the D23 Expo.

Lego Toy Story: Lego "Toy Story" is a Lego theme based on the Disney·Pixar's "Toy Story" film franchise.  The first four sets were released on December 30, 2009, with an additional two sets being released on January 4, 2010.  In May, five Lego and four Duplo sets were released under the "Toy Story 3" sub-theme.

Lego: The Adventures of Clutch Powers: Lego: The Adventures of Clutch Powers (also known as The Adventures of Clutch Powers) is a 2010 British-American CGI animated comedy-adventure film.  The film is based on the concept of the Lego toy series.  This movie was the first feature length Lego movie.

You've Got a Friend in Me: "You've Got a Friend in Me" is a song written and first recorded by Randy Newman.  Originally written as the theme song for the 1995 Disney/Pixar animated film "Toy Story", it has since become the theme song for its sequels, "Toy Story 2" (1999) and "Toy Story 3" (2010) as well as a musical leitmotif throughout the whole "Toy Story" franchise.  The song was nominated for both the Academy Award for Best Original Song and the Golden Globe Award for Best Original Song, but lost both to "Colors of the Wind" from Disney's "Pocahontas".

Toy Story (franchise): Toy Story is a computer animated film series and Disney media franchise that began with the original 1995 film, "Toy Story", produced by Pixar Animation Studios and released by Walt Disney Pictures.  The franchise is based on the anthropomorphic concept that all toys, unknown to humans, are secretly alive, and the films focus on a diverse group of toys that feature a classic cowboy, Sheriff Woody, and modern spaceman, Buzz Lightyear.  The group unexpectedly embark on adventures that challenge and change them.

Toy Story 3: Toy Story 3 is a 2010 American 3D computer-animated comedy-drama film produced by Pixar Animation Studios for Walt Disney Pictures.  It is the third installment in Pixar's "Toy Story" series, and the sequel to 1999's "Toy Story 2".  It was directed by Lee Unkrich, the editor of the first two films and the co-director of "Toy Story 2", written by Michael Arndt, while Unkrich wrote the story along with John Lasseter and Andrew Stanton, respectively director and co-writer of the first two films.  The plot focuses on the toys Woody, Buzz Lightyear, and their friends dealing with an uncertain future as their owner, Andy, prepares to leave for college.  The film features an ensemble voice cast with Tom Hanks, Tim Allen, Joan Cusack, Don Rickles, Wallace Shawn, John Ratzenberger, Estelle Harris, Jodi Benson, and John Morris reprising their roles from the previous films, along with Blake Clark as the voice of Slinky Dog (because Jim Varney died ten years before the release of the film) and Ned Beatty, Michael Keaton, Whoopi Goldberg, Timothy Dalton, Kristen Schaal, Bonnie Hunt, and Jeff Garlin voicing the new characters introduced in this film.

Toy Story 2: Buzz Lightyear to the Rescue: Toy Story 2: Buzz Lightyear to the Rescue (also known as Disney Pixar's Action Game: Toy Story 2) is a platform game based on Pixar's computer animated movie "Toy Story 2" and is the sequel to the first "Toy Story" video game.  It was released for the Nintendo 64, PlayStation, Dreamcast, and Microsoft Windows in 1999 and 2000.  A different version of the game, titled "Toy Story 2", was released for the Game Boy Color on November 22, 1999.  A sequel to the game was released 11 years later based on "Toy Story 3".  It would be re-released as PSOne Classic for PlayStation 3, PlayStation Vita and PlayStation Portable.

Supporting paragraphs: Lego Toy Story Toy Story (franchise)
Answer: Pixar Animation Studios