Annual unlimited is $480 if you don't volunteer (on the order of a half day or so a couple times/year) , $320 if you do. It works out to $6-10/week (assuming you take a few weeks off) for all the sessions you can ride. Coaching is more.
Various regular training sessions, the qualification requirements, and rates are listed here:
http://lavelodrome.org/training.htm
Races are listed on a separate page- there are friday training night races about twice/month, and saturday TT and omniums about once a month.
If you're already a cat 1/2 on the track you don't need to do the cert class. If you race, you can get the cert class free (included with your entry+track fee) when you race one of the LAVRA saturday omniums.