Hi,
You can add both the loan amounts for claiming income tax deduction.
Yes, you will loose out the HRA deduction. HRA deduction is available only when you are living in a rental apartment.
Further, there are certain precautions which you need to take while buying a property such as TDS deduction @1% if value of the property exceeds 50 lacs.
Please free to call/ revert in case you need more clarity.
Thanks and regards
Abhishek Dugar
CA CS B.Com