Meat dishes are extremely popular in Chad, and international visitors enthuse about the meat (such as lamb). Food is often consumed without the use of utensils, thus hand sanitizer may be a prudent precaution. It is considered impolite by Muslims to eat with the left hand. When dining with or being served by Muslims in Chad, use only your right hand.
To prevent illness, follow standard health travel recommendations for raw fruit and cooking needs. The US State Department website provides information on eating safely when traveling overseas.
Because France was Chad’s (or Tchad’s) colonial occupier, you may also easily use euros. However, in comparison to the rest of Africa, Chad is an expensive location for most people.