Do drow actually court other drow?
If they do, do they go out on dates?
Naturally. Who doesn't enjoy spending time with another they deeply like?
Is there a period of time after which it is appropriate to begin sexing each other up?
It would vary on the individuals of course, but usually pretty fast, as Drowolath are pretty sexual creatures.
What is the minimum age of consent (given drow aging differences from humans, I am assuming that this changes)?
For that matter, IS there a minimum age of consent?
How does drow society view relationships publicly? What I mean by this is: is it a big deal if it gets out that two people are going at it, or does nobody actually care that much?
Depends on the individuals and most importantly, social standing. All in all, it usually isn't that big a deal.
Finally, how do the drow feel about interracial relationships?
This also varies, but half-breeds are viewed rather negatively with great stigma, so I imagine that the couplings themselves are viewed with equal scorn.