Deduction related with the purchase of a property

[Jose Leandro Gobea]

Hello guys, I have a question. When I buy a property  how much can I deduct in average from that purchase for that year or what thing related to that purchase can be deducted.. ( example: the down payment?) Also, can I use the deductions from real estate to reduce my active income and income from the stock market?  Thank you so much in advance and I know this is a general question is not base in any real example so I understand that the answer can be different for each property and situation.