+1 on what wes said.
4mo and r32 have different suspension. all 2wd golfs have same suspension type.
so providing you buy for 2wd you will be fine.
as wes said, better to have matching shocks and springs. as for coilovers on front and springs and shocks on back, mk4s actually don't have coil over strut suspension on the back, its a separate spring and shock so technically a normal spring and shock set up is the same as the stuff provided in the coilover set up kits except you don't get the adjusting bases in spring and shock kits which you do in coilovers.