A large pot (a 19L pot will be able to do about 13L batches or 23L if doing MAXI-BIAB)
A mashing and sparging bag
An oven
Grains
Hops
Water
Or you can just get a 33L boiler and use that.
Your best bet would be to check out the australian forum. http://www.biabrewer.info A very informative site and the calculator is very good for scaling down recipes.