Go to
Stew Mac's website, and buy a couple of books. That will help you more than anything you can get on the web, guarantied.
Also, look at
Warmoth's website. They are the largest, and the best seller of "replacement" parts for instruments with Fender style construction. They make great stuff, and using a premade body, and particularly a premade neck, is a really good idea for your first instrument.
I HIGHLY recommend that you buy finished parts for your first instrument. I have a very nice spray booth for my finishing, but you probably don't. Don't risk your health without one.
As too the woods and pickups to use to get the sound you want, read a lot. There is information all over the place on this stuff. Read everything you can, and then read some more. Then you are ready to make a decision. You might even get it right.
For pickups, as far as I am concerned, the only choice for bass is Bartolini, but there are many people who disagree with me on that.
Lastly, do not expect to save money by building it yourself. You won't. At least, if you want something more than a half assed job, you will not save money. Build an instrument because it is fun, and because you want to BUILD and instrument, not because you want to save money.
Light
"Cowards can never be moral."
M.K. Gandhi