Home brewing beer takes really just 4 simple ingredients.
Those ingredients are yeast, malt, hops and water.
Water is over 90% of the brew.
Starting with the most simple brew is best before you get into doing flavors.
The barley will be malted before use in the brew.
Hops are like the preservative with their essential oils adding aroma with the flavor too.
  Yeast the fungi is essential in brewing beer.
The reason for this is that is what makes the alcohol.
Pots and containers that are needed are not paint buckets or empty milk jugs.
Use glass containers if at all possible.
  If you should use plastic make sure it is food grade or do not use it, you do not want to mess up the taste of your hard work.
During the fermenting process use an container that has an airlock that allows the carbon dioxide to escape.
This fermenter container size should be about 20% larger than batch that is fermenting.
This is for the foam that is going to be made by this process.
The brew pot size you are looking for should at least 3 gallons.
If you should order a home brewing kit these are some of the things you should except to get in them ie: fermenter with lid, hydrometer, sediment reducer, bottling valve, thermometer, bottles and caps.
Of course beer kit concentrate with yeast, brewing sugar and carbonation drops.
I have not listed everything that can be in a brewing kit, just some of the most basic items.