The DAZ people are usually sold (if not free) as a base with limited morphs and a set of morphs is sold as an add-on package.   So, yes, you would need to buy that morph expansion for the character you want to use.   

For example, here's the Morphs++ for V4:  http://www.daz3d.com/i/3d-models/-/victoria-4-2?item=4787&spmeta=rl&_m=d