Basic clothing required for this martial art: teeshirt, loose jogging pants, training shoes, leather rigger gloves (inexpensive and available in hardwear stores).
... And for the more advanced student:
1600N fencing mask: This is a top of the range fencing mask Lower protection masks (ie 350N) are not acceptable.
Hand protection: This can range from plate or chain maile gauntlets, Lacrosse gloves or even some sorts of motorcycle gloves (with protective plates).
Padded jackets:  Called Gambesons or Jacks.   

Blunt steel swords: These swords are made by companies specializing in HEMA compatible swords. Swords displayed in high street shops are NOT useable for this martial art and are for display purposes only.