Hi Deepti,
Motorized treadmills are easy to use and more accessible and comfortable to use. First day dont go for any programmes, just go for quick start and in following days after a week of regular workout on treadmill you can go for fat burn programme or cardio programme as per your goal. Once in a week go for interval training programme. Rather sticking to any particular programme on treadmilll, better to keep on changing your programmes to avoid getting used to any programme.