  We have analyzed a sample of 74 magnetically active stars toward the
Taurus-Auriga star-forming region. Based on accurate data on their basic
physical parameters obtained from original photometric observations and
published data on their proper motions, X-ray luminosities, and equivalent
widths of the $\rm H\alpha$ and Li lines, we have refined the evolutionary
status of these objects. We show that 50 objects are young stars with ages of
1-40 Myr and belong to the Taurus-Auriga star-forming region. Other 20 objects
have a controversial evolutionary status and can belong to both Taurus-Auriga
star-forming region and the Gould Belt. The remaining four objects with ages of
70-100 Myr belong to the zero-age main sequence. We have analyzed the
relationship between the rotation period, mass, and age for 50 magnetically
active stars. The change in the angular momentum of the sample stars within the
first 40 Myr of their evolution has been investigated. An active
star-protoplanetary disk interaction is shown to occur on a time scale from 0.7
to 10 Myr.
