Can a tenant lock me out of the basement while going through a holdover eviction

You are in considerable trouble here, but if you must get to the building systems, you can take bolt cutters to the lock. Still read what Mr....

Continuation of tenant issue ?

And what is your question? How long will the judge allow her to stay? Present the judge with all of these facts as clearly as possible and that...

Unless the discrimination is based on a fairly long list of forbidden things like race, color, creed, marital status, immigration status, and so...

Being related to someone who will not actually live there should not prove a barrier.

The landlord is entitled to switch to electric stoves and many landlords are for obvious reasons. If that means increasing your expense, the DHCR...

Will we be able to renew our lease?

yes, they can refuse to renew your lease because of this and there is nothing you can do about it.

Can someone else act for the landlord? I work long hours and can’t get to the court house

If you don't hire a lawyer, you will simply have to take the time off from work. If you do hire a lawyer, you may have to anyhow.

Am I obligated to show my apartment after going to court to answer an eviction and getting 6 months to move out?

Yes, that is a requirement. However, enforcing it against someone being evicted is nearly impossible.

Is it normal to personally guarantee a hazardous materials clause in a lease?

In commercial tenancies, EVERY guaranty is "normal".

I've been living here almost 9 years never any problems till the new tenant moved in and threatened to get me thrown out.

You need to answer any court proceedings against you and explain all of this. I would strongly recommend that you have a lawyer with you.