Harford, who was appointed as manager after Rotherham's relegation in April, wants a number of new faces after releasing several players this summer.
He said: "I will try and build the right attitude in Rotherham and take the club forward.
"We need to have a look at the clubs youth and trim the budget back a bit and I need to generate some cash flow for me to bring the players I need so obviously there will be some comings and goings."