In Montreal, Auf der Maur attended the Fine Arts Core Education (FACE) School and Moving in New Directions (MIND) High School—both of which are schools of alternative education. At FACE, she was a member of the classical choir and at MIND, she was "part of the small English elite", where she formed friendships with Leonard Cohen's daughter Lorca and Rufus Wainwright. At school, she became interested in photography and subsequently attended Concordia University, from which she majored in photography in 1994. At Concordia at age 19, Auf der Maur began working part-time as a disc jockey at Bifteck, a well known rock club, where she met several musicians including Steve Durand.
Tinker had a brief recording career, releasing two 7" singles, "Realalie" and "Green Machine", on the independent record label Bear Records in 1994. The group disbanded in summer 1994 after Auf der Maur accepted Courtney Love's invitation to become the bassist for the alternative rock band Hole, a job she initially declined:
In summer 1994, Hole was in need of a new bassist after the death of Kristen Pfaff. Of her original decision to decline Love's offer to join, Auf der Maur recollected: "I said no because it seemed like a very sad scenario to be going into ... it just seemed like a very sad place", citing Pfaff's death a "red flag" and a reason to not join the band. Upon meeting Love and drummer Patty Schemel, Auf der Maur said she got "a flash of destiny in her eyes" and accepted the offer. She completed her Bachelor of Fine Arts (B.F.A.) at Concordia and was recruited as the bassist for Hole two weeks prior to its performance at the 1994 Reading Festival. "Lou Barlow and Evan Dando were watching from the side of the stage," she recalled. "I probably didn't even move. I just thought, 'As long as I get these parts right, it'll be just fine.'"
From 1994 to 1995, Auf der Maur toured worldwide with Hole in support of its second studio album, Live Through This (1994). On the tour, Auf der Maur was described by guitarist Eric Erlandson as "bringing sunshine to the band" during the "dark and grey" atmosphere of the tour, which was problematic due to the band's recent bereavements—notably the death of Pfaff and Love's husband Kurt Cobain—as well as Love's drug addiction. Auf der Maur befriended Patty Schemel and rented a house with her following the two-year-long tour. The duo began a side project, Constant Comment, and released a split 7" single with Red Aunts on Sympathy for the Record Industry featuring the song "Firecrasher". Auf der Maur has since said her friendship and musical compatibility between her and Schemel was based on a "redhead connection"; Schemel has referred to Auf der Maur as her "anchor" during the period following the death of Pfaff and Cobain.
Auf der Maur was a photography major specializing in self-portraiture at Concordia University when she was invited to join Hole in 1994. Her photos have been published in Nylon, Bust, Mastermind, and American Photo, among other magazines. Her photos were also in the exhibition The Kids are Alright at Sotheby's in New York City along with photos by Yelena Yemchuk.