How much do I need to repay the bank for a $750000 property loan if I sell my house after 5yrs for a 30yr loan?

Every year the bank give you a statement, just look at the statement.

You need the exact interest rate on your mortgage. Create the amortization table for your loan. See the balance at the end of 5years. Add any fees if any.

Just get the loan specialist at the bank to provide u with the amortization table. You dont need to calculate yourself.