Assuming your name is not on the deed. the procedure is relatively simple to add your name to the deed. And further assuming the facts as stated a new deed might have to be prepared adding your name to the title.
From the information provided it appears you will have to file a petition to be appointed the Administrator (assuming no Will) in the Surrogate court of the county in which your uncle resided. The statue dictates as to who can seek that appointment. It appears u might be able to seek the appointment provided there is no objection.
You should try to avoid a foreclusre by either negotaiating with the lender on the condo to reduce your rate and thereby your monthly obligation on it. Or try to sell the condo - assuming you have enough of a cusion between what you owe and what it will sell for, then you should be ok. Or try to negotaite a short sale with the lender. This allows for you to control the damage. Foreclosing on the condo should be the last resort.
To answer your question -yes the money should be held in her escrow account. You could look at the check to see what it states. Anyway she should have contacted you directly as her client. But having said that the issue at this time, if I undersatnd correctly, is that you want to get the $5,000.00 balance at this time. You could certainly try to litigate over it. I can undersatnd if all she wanted u to sign was that u are in receipt of that money then that would be appropriate. But since...
The Landlord is suppose to provide a habitable place with access to water and heat. Howveer rit can be dertermined as part of the lease as to who is responsible for it. The Landlord can require u to transfer the water meter and the utilities in your name unde rthe lease making you responsible for it.
From the facts it appears that your mom died intestate and without a will. If she was married at the time of her death then he would be able to obtain Letters of Adminsitration giving him the authroity to sell the property and have a stake in the proceeds. But since they were not married at the time of her death, NY law on testateacy states that the children are next in line to inherit the property and all assets owned by your mother exclusively at the tme of her death.
It would be a fradulent transfer. Assuming the title company would insure such a transaction without you being present at the closing. Moreover the title company at the closing takes a photo Id of all sellers and buyers at the closing. It would be difficult to sell the property and have a title company insure title on such a sale.
However if you are concerned and want to be proactive you could maybe bring a partition action to force a sale of the premises.
The deed should read from Dad as surving tenant by the entirety to yourself. It should be recorded with the county clerk where the property is located. It might be best to retain the services of an attorney to assist you.