All five people were out of the cars by the time paramedics arrived.
The driver of the Peugeot, a woman in her 20s, suffered chest pain in the crash, while the toddler suffered a minor head injury. They were both taken to Russells Hall Hospital.
The front seat passenger, a man in his 20s, suffered a suspected pelvic fracture. He was taken to the Queen Elizabeth Hospital in Birmingham for treatment.
The driver and the passenger of the Peugeot, both men in their 20s, were taken to Russells Hall Hospital for treatment to minor injuries.