For both the Thursday night Jaggo and the Friday morning Sikh Wedding, your attire is called a Salwar Kameez - Punjabi Suit. It will consist of a sleeved, long tunic (the kameez), long, loose pants (the salwar), and a long matching scarf (dupatta). The dupatta will serve as your head covering for the wedding inside of the temple on Friday morning.
For the Jaggo, the attire will be a Punjabi Kurta Pajama. This consists of a long tunic (the kurta), and matching pants (the pajama). For the Sikh wedding, most men typically wear a Kurta Pajama with a kurta vest or suit and tie - jacket optional. For this, you will also need a handkerchief to wear as a head covering. (Turbans will be provided for immediate family).