Now that you mention it, I also forgot to mention expense for going out on dates occasionally. I would expect to pay $50 to din out with friends and $100 for dates if we're seriously dating.
The car would be an introductory luxury car like a Lexus IS or BMW 3 series. No car payments and assuming it's paid off.
Whats amazing about the Bay Area is how much money people have to just throw around. Thats why I asked about the type of car to see what you are like.
People have money to get a second car for racing on the weekends, or they get a pilots license to go flying, or they take expensive ski trips, go surfing, scuba is hot too. I've seen friends spend $1000 on a bicycle and spend time on that on our ultra nice sunny weekends. Shopping at Burberry for jackets, shelling out $150 for jeans, going to Indian casinos and plopping down $50-100 a hand. There is a lot of money to be made and spent here.
But my advice is to try to ignore it all. Get a decent 1 bedroom in the East Bay. Max out your 401k, save a bit, and have a fun weekend once a month instead of every weekend. Ignore the nice cars your coworkers are driving (they are probably leasing them anyway). And when your friends invite you to go for a $400 dinner in Napa, politely decline.