Berries can be used to dye cloth, if that's what you mean.
Plains women would use ground berries to get dye and color for their clothing. Bits of fur, feathers, and shells might also have been used.
To sweeten foods, to dye for clothing and also to give to babies.
roots berries and grapes
That depends on what KIND of berries they are. Some red berries are edible, others may be used for decoration.
The berries have been used for chest pain complaints and the oil of Juniper can be used as a diuretic.
The berries are used.
juice or scent
There is no specific collective noun for berries, in which case a noun suitable for the situation is used; for example a patch of berries, a quart of berries, a box of berries, etc.
Yes
Berries ease the stomach and can serve as a counter poison. Leaves are used to ease coughs and other respiratory problems.
Juniper berries are the fruit of the juniper plant. They are used as the chief ingredient in the alcoholic drink gin.
Guinea pigs are not used as clothing.