1. Never post your email address.
2. Make sure you plan out your approach to any question.
3. See if you can dig up some resources, google, etc.
4. Ask somebody you know, teacher, student, etc about your question.
5. After doing all these and you are still way behind, then you should think about asking.
Things you will want/need:
Optical encoders to ensure precise movement
Solid state gyroscope to ensure precise turns and proper direction heading.
Thermal IR sensors to make sure you find your heat source.
A computer fan to blow out the flame. Easiest way to do it.
Smallish rectangular body. A few inches smaller than the smallest width of the track/rooms.
If at all possible GPS would make this a cake walk.
If you can accomplish all these I can imagine a successful robot. My robotics team uses all these but the fire elements (fan, thermal sensor) and the base. We can turn 90 degrees exactly. We use mechanical encoders (continuous rotation potentiometers). We have a master programmer who works for himself and is filthy rich, but he only buys what he needs. Very efficient.
As for the sensor if you can read the datasheet correctly if could be your thermal sensor.