Taillight bulbs

["TM" <mizutanit@mindspring.com>]

This is a stupid question, but I can't find this info in the Bentley.
What kind of bulbs are used in the taillights of an '86 5kcstq? One
burned out, so I'm going to replace it and am thinking of replacing
all of the bulbs, just to prevent any burnouts in the near future.

I'm hoping I can get these at the local auto parts store, not the
dealership.

Also, is it difficult to remove the reflector/taillight section that
is part of the trunk lid? I'm replacing the black plastic part that
has the license plate holder and am hoping that this is not a very
difficult task. Do I need to buy some sort of sealant, like the black
gooey stuff?

Regards,
Taka Mizutani
'86 5kcstq