I own a house and have bought another house, doubts regarding tax treatment for IT deduction from my salary?

Iam staying in the first house and have bought another new (second) house on loan (spouse is co-applicant, but not co-owner).What are my tax implications regarding HRA,home loan EMI when filling for IT returns.Incidentally my spouse is also salaried in my same office. PLEASE REPLY.
The first house has no home loan, its only that Iam staying in it and purchased the second home on loan.

My father made a gift deed to me. Can he make another gift deed of 40% of the same property?

We had a single floor house. My father planned to make first floor & made a gift deed to me. My brother is a lawyer & he drafted another gift deed & my father signed on it where it is written Ground Floor + 40% of First Floor + First Floor Roof Right.
My question is when my father already gifted the first floor then the same property can he gift again. If it all he does it without knowing , how to sort out the issue?