Toscano-Anderson was born April 10, 1993 in Oakland. He is the son of Patricia Toscano, has two brothers (Avery and Andrew) and one sister (Ariana). Toscano-Anderson attended Castro Valley High School, where he averaged 16.6 points, 7.0 rebounds and 5.0 assists per game in his senior season and took the team to the state title game. He continued his basketball career at Marquette, where he majored in criminology and law studies. After college he went on to play in the top professional basketball league in Mexico for several seasons. Toscano-Anderson has also appeared for the Mexican national team, seeing action in the 2016 FIBA World Olympic Qualifying Tournament.