A Study of Talquetamab With Other Anticancer Therapies in Participants With Multiple Myeloma

Inclusion Criteria: * Have documented initial diagnosis of multiple myeloma according to International Myeloma Working Group (IMWG) diagnostic criteria * Have measurable disease at screening as defined by at least 1 of the following: a. Serum monoclonal protein (M-protein) level greater than or equal to (\>=) 1.0 gram per deciliter (g/dL); or b. Urine M-protein level \>= 200 milligrams (mg)/24 hours; or c. Light chain multiple myeloma: Serum immunoglobulin (Ig) free light chain (FLC) \>=10 milligrams per deciliter (mg/dL) and abnormal serum Ig kappa lambda FLC ratio * Have an Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1 at screening and immediately before the start of study treatment administration * A woman of childbearing potential must have a negative highly sensitive serum beta human chorionic gonadotropin (beta-hCG) pregnancy test at screening and a negative urine or serum pregnancy test within 24 hours before the start of study treatment administration * Be willing and able to adhere to the lifestyle restrictions specified in the protocol, including adherence to the applicable immunomodulatory drug (IMiD) global Pregnancy Prevention Plan (PPP) or local PPP/Risk Evaluation and Mitigation Strategy (REMS) program Exclusion Criteria: * Live, attenuated vaccine within 4 weeks before the first dose of study treatment * Received a cumulative dose of corticosteroids equivalent to \>=140 mg of prednisone within the 14-day period before the star…