About 3 tablespoons of honey iirc.
The BBS kits are pretty popular. I got my start with one, did some 1 gallon kits with grain and yeast and hops purchased at the LHBS with recipes scaled using simple math and beercalculus - and a gram scale to measure hops, and moved up to 5 gallon batches and kegging. A good friend of mine often has many 1 gallon batches going at once.
You may enjoy this thread: 1 Gallon Brewers UNITE!
I highly recommend the short-for-1-gallon-batches autosiphon that BBS sells, and i also recommend getting a racking cane, if you have a local home brew shop or time to get one before you bottle.