aaah, what the h***, my 5cents.
D60, I believe has same (don't quote me on it) sensor as D50, D70, D80, D200, D40 models have. Meaning shooting at higher ISOs will totally suck thus ISO400 is a safest way to start. You kit lens probably can't be open wider then 5.6 unless you shoot wider then you'll get wider apertures.
SO... ISO 400, f/5.6, 1/60 (1/50) sec.
Personally, I prefer a bit of grain/noise on BW thus if you go to ISO800, you'll get that extra stop but will be grainy - again, I have no problem with that but these are your images.
There are some cheaper 3rd party flash units out there that are significantly cheaper. Most can be used in manual mode. If you do get one, try this starting point...
ISO 400, 1/60sec, f/5.6, flash at 1/4power with stofen(similar) diffuser on facing straight forward - 10-15 feet from your subject, lighting should be ok ( but needs to metered). When you bounce the flash, boosting up to 1/2 power and a bounce card (self made) will usually be enough.
However, it is hard to judge the situation w/o actually seeing it thus settings I through out are just starting points and NEED to be adjusted.
Oh and ofcourse, unless you're shooting raw, preset your WB
