Newest newbie with three questions

[slogans7]

Hi all - I'm proud to join you all, as the new owner of a much-coddled 2002 triple-black S.

Well, enough about me. Got some questions for y'all:

My car came with but one key. Since I'm really good at losing stuff, I want another, and don't want to pay $300 the local dealer requested through a clenched-teeth grin. I don't even need all the electonics, just a key that will open the door and start the engine. Can I get one on ebay?

Second, what oil would you recommend for someone who lives in Southern California and does mostly freeway driving?

Finally, in my enthusiasm to play with the wind deflector, I broke one of the little locking hinges. Can I just replace just the locking thingie without paying an egregious amount for the whole thing?

Thanks in advance, and glad to join the group!