Complex sentence: Tony's musical career started with a band that Tony started in junior high school in his garage which he played Tupperware and pots and pans, he also wrote the lyrics, it comes as no surprise that the band split up soon after.
Split into simpler sentences: Tony's musical career started with a band that Tony started in junior high school for which he played Tupperware, pots, and pans. It comes as no surprise that the band split up soon after.