6lbs of extract in a 5 gallon batch will give you an OG of around 1.043 if it's the only fermentable that you use. This will give you an ABV of roughly 4%. You don't need the wheat extract, but if you use it it'll just make the beer stronger.
Knucklehead Brewery, Est. 2007
Always do sober what you do drunk. That will teach you to keep your mouth shut. -Ernest Hemingway