Yeah, instructors are part of the package for new track drivers, although in VCMC's case, they used to charge $10 or $20 extra. In exchange for that, VCMC also tends to have a higher instructor-to-student ratio.
For helmets, a current SNELL M grade one (M for motorcycle) is available from any motorcycle store. However, the SA grade (meant for auto racing) is more appropriate for lapping and other motorsports use. Locally,
Driver's Edge sells them.