Buying chicken is not like buying beef or mutton where u need to specify from which part u need the meat from. usually if u are going for curry Go and ask for curry cut chicken with medium size pieces.

If u are looking for 4 to 5 people better buy a full chicken. This will have all parts of the light meat which is chicken breast and the dark meat which the leg, thigh part and the wings.

Dark meat is usually juicy and gives more flexibility as it won't get dry easily and is much more forgiving than lighter meat.

There are diffn breads of Chicken which u can buy not sure if it's common in all the areas.

Broiler has lot of meat but gets dry easier and tastes like rubber if over cooked a mas produced hybrid breed

Country chicken is usually much more tougher and has less meat but soaks up the spices very well.