I'm not very familiar with CA laws, however the lead base paint disclosure is a federal law. It also shouldn't have anything to do with an eviction process, rather its just a law suit in itself.
What I would do is first, read over the lease and see if it has a spot for the lead base paint disclosure. It should say that the tenant agreed that they received a copy of it. This is very important for a home that is older then 1978 whether it has lead or not.
As far as the eviction, it is only taking that long because the eviction is being done wrong. You have to get a lawyer right away. In the time that was wasted for not getting a lawyer or following the rules of eviction, costs are going through the roof. Do it right the first time is a great practice especially as a landlord.
CA might be a tough one to evict in, but generally no eviction should take longer then 2 months. In most states it can be done a lot sooner (usually less then 1 month if done correctly).
Somewhere in the eviction process the tenant is winning. During the court battle it should be obvious why. Could be not enough notice or many other factors. If you try to do it yourself, make sure to also pay attention to the local laws as they can effect how the eviction needs to go as well!