Can I use a 3D scanner to create 3D models to carve as well as 3D print?

Yes, models created with a 3D Scanner are typically saved in common 3D formats like a .stl.  These files can be imported into CAM programs like Vectric Cut 3D, Vectric V Carve and Deskproto where they can be assigned tool paths to carve the object out of a material.  This is commonly done with two tool paths: Roughing and Finishing, using a standard end mill and a ball nose end mill, respectively.

These files created from a 3D scanner can also be used for a 3D printer.

Here is a good article with a list of the best 3D scanners for 2017: https://pinshape.com/blog/the-11-best-3d-scanners-on-the-market/

STEPCRAFT also has a 3D Touch Probe which can be used for 3D scanning.  The following videos show how that works:

Can I buy the STEPCRAFT Touch Probe for use with a non-STEPCRAFT CNC machine?

Yes, you can purchase the Touch Probe and it will most likely work with just about any CNC.  However, you be responsible for the correct software setup, macros and configuration for your system.  STEPCRAFT will NOT support the operation or configuration of the Touch Probe for non-STEPCRAFT machines.  The unit will, however, be warranted for mechanical defects.