Hi Langley,
 > What are equipment costs like now?
If you're asking about purchasing a BC and regulator setup,
you're looking anywhere from $500 up through about $1500.
If you add a dive computer then it would be another $2-500.
Mask, fins and snorkel will run $50 to $150.
 > What do lessons cost now?
This is always a tough one to answer since there are lots of
variables associated with the check out dives and equipment
rentals.  My best guess is that you're looking at a total price
of $200-250 for open water lessons.
 > I need an update - is there a refresher or should I relearn
 > from scratch (I am PADI certified but lost my C-Card years ago)?
PADI does offer a "Scuba Tune-Up" program designed for people
who've been out of the water for a year or two.  You might want
to consider a complete retraining if it's been quite a long time
since you've been diving.  There have been numerous equipment
changes in the last five years, as well as new thoughts about
safety stops, dive physics, etc.
--- Dive, dive, dive!
---------------