As the previous comments provide, the date of funding would be the date of the grantor's death.

Generational Skipping Trust

Because your grandmother retained an income interest during her lifetime, the trust may be included in her gross estate. As the previous comment...

My mother has a revocable trust that she no longer wants to manage.

If your mother is the grantor of the revocable trust, she can generally amend the trust terms freely and this would be fairly simple to do. If she...

In a family trust with two trustee's can the beneficiaries remove one of the trustee's?

A review of the trust itself will provide an answer as to whether beneficiaries may remove a trustee. If the trust terms do not authorize removal...

Can somebody help me find a tax lawyer?

I agree with the above comments but also consider asking a trusted CPA for a local referral.