A charged body has only one type of charge. The electric field and force are the same thing and in the same direction. There are a finite number of field lines. Fields don't exist unless there is something to detect them. Forces at a point exist without a charge there.
Field lines are paths of a charges motion.
The electric force is the same as the gravitational force. Field lines actually radiate from positive to negative charges and convey motion. Field lines exist only in two dimensions. An electron is pure negative charge with no mass. Oil drops are electrons.