Taxes for buying furniture for the second home (personal residence)

Hello!

I have quite a complicated situation. I am selling an apartment that I own 50%/50% with my ex-boyfriend (not married)  and purchasing a separate apartment the price of which is smaller than my part in sold property. However, this new apartment has furniture and the buyer wants to make a separate agreement for this furniture and appliances. The price of this separate agreement is quite high  (about 30% of the apartment cost). therefore, I was wondering if I can receive any tax deduction for this furniture or consider it a part of the cost of this new apartment (since it is already there and being sold by the same person). 

Also, would I be able to count this cost to cover the earnings from the sold apartment? (the sold apartment was the primary residence but for less than 2 years within the last 5 years and I do not really have any evidence of this).

Thank you very much!