The hair and bikin are part of the basic texture that loads. You simply need to find another texture (mat pose) to apply that doesnt have them.  There are some skin texturss in freestuff if you dont have any others of the daz textures.

There may be a morph for the head involved.

You should find similar morphs for v4 as with v3 in the head. I dont know what morphs were supplied with the base figure if any. Look in the runtime!Daz folder to see what morphs there are. You may have to expand the morph list by clicking on the group name , it will have  a + sign next to it.