What type of surface movement existed before plate tectonics?
It the assumption is made that the earth was mainly liquid ball there would have been convection currents in the liquid.
The crust is hardened magma. It is possible that at one time there was as yet no crust. The convection current would have moved the liquid surface of the earth. As the crust hardened the crust would have formed the divisions in the crust that now the tectonic plates.
The basic movement of the liquid magma would have ben the same.