Buying home with 50% amount of loan and 50% paid by father

Hello Experts

I hope this is a best category to ask.

I am buying house which will have official cost of 20 Lacs. My father is going to give me 10 lac rs as a gift (which he is going to get by selling our house which was on name of my mother, so after her death i have a share in it) and i am going to get 10 lacs worth loan.

I want to know how to plan tax in order to avoid future problems of income tax.

How to receie money from father and paid to builder officially.

Plz help