Temozolomide, Cixutumumab, and Combination Chemotherapy in Treating Patients With Metastatic Rhabdomyosarcoma

Inclusion Criteria: * Patients must be eligible for, and enrolled on D9902 prior to enrollment on ARST08P1 * Patients with newly diagnosed, biopsy-proven metastatic rhabdomyosarcoma or ectomesenchymoma (stage IV, clinical group IV) are eligible for this study; patients with stage IV, clinical group IV RMS with parameningeal and paraspinal primary tumors, including those with intracranial extension (ICE) are eligible for ARST08P1; ICE is defined by contrast magnetic resonance imaging (MRI) showing that the primary tumor touches, displaces, invades, distorts, or otherwise causes signal abnormality of the dura in brain or spinal cord in contiguity to the primary site; ICE is also presumed to exist if the cerebrospinal fluid (CSF) cytopathology is positive for tumor at diagnosis * Patients must have a performance status corresponding to Eastern Cooperative Oncology Group (ECOG) scores of 0, 1, or 2; use Karnofsky for patients \> 16 years of age and Lansky for patients =\< 16 years of age * No prior chemotherapy or radiotherapy except for use of corticosteroids or emergent radiation therapy; patients requiring emergency radiation are eligible * Creatinine clearance or radioisotope glomerular filtration rate (GFR) \>= 70 mL/min/1.73m\^2 OR maximum serum creatinine based on age/gender as follows: * 0.4 mg/dL (for patients 1 to 5 months of age) * 0.5 mg/dL (for patients 6 to 11 months of age) * 0.6 mg/dL (for patients 1 year of age) * 0.8 mg/dL (for patients 2 to 5 years of…