I just brewed my first wheat beer yesterday and wow that thing took off quick.
So what kind of filtering are you talking about? Just enough to get big particles out or are you talking enough to make it clear? Personally I'm not a fan of filtered wheats... that's just me though
Personally I love Cascade hops... My oatmeal stout has 4 oz of hops (all low AA so not a overly bitter beer). 2 oz of which where Cascade...
Depends on how bitter you're wanting to go.
If you dont want something overly bitter use hops that have a low acidity. If you did something like .25oz of Cascade hops for 60min and .25oz at 5 min and .5oz at 2 min you'd get a lot less of the bitterness from them and more of their aroma/flavor. That'd give you around 9-10 IBU, which is not...
The local 'microbrew' where I live (it's in quotations because their beer is more bmc like) makes a beer without hops, it tastes like bud lite with sugar added.
Here is a good read on secondaries. It's entirely up to you. It's not necessary. There is a lot of debate over glass to plastic carboys, again up to you. I personally love my glass carboy, but it has the potential to break.