Re: general denial
Before you file a general denial/answer, you should tender this to auto insurer (if you have one). Notifying them late may jeopardize any potential for coverage. If covered, an attorney will be appointed to represent you.
If you do not have insurance and the claim is significant, I recommend that you hire an attorney. The rules of civil procedure, particularly discovery, are complicated.
If you cannot afford an attorney, try your local county bar association or law library. They may be able to put you in contact with legal aid or the resources needed to represent yourself.
As for requested form, go to:
http://www.courtinfo.ca.gov/forms/fillable/pld050.pdf
A General Denial is a kind of answer or responsive pleading. Besides the general denial, you will likely want to include some affirmative defenses.
For self-help assistance, go to:
http://www.courtinfo.ca.gov/selfhelp/
Good luck.
