... this would include preset sounds like legato and staccato, etc?
If it's in the library, it's defined in the template.
Also, if I already have the VDL template, would I just buy the Sibelius S7S-VDL Bundle? Would this be one template that would be for VDL and Sibelius sounds?
All you would need is the S7S Template. After purchasing, let someone know
you have both VDL and S7S templates so they can get you the bundle files.