  We have created a framework to facilitate the construction of specialized
target lists for radial velocity surveys that are biased toward stars that (1)
possess planets and (2) are easiest to observe with current detection
techniques. We use a procedure that uniformly estimates fundamental stellar
properties of Tycho 2 stars, with errors, using spline functions of broadband
photometry and proper motion found in Hipparcos/Tycho 2 and 2MASS. We provide
estimates of temperature and distance for 2.4 million Tycho 2 stars that lack
trigonometric distances. For stars that appear to be FGK dwarfs according to
estimated temperature and absolute magnitude, we also derive [Fe/H] and
identify unresolved binary systems with mass ratios between 1.25 and 3. Our
spline function models are trained on the unique Valenti & Fischer (2005) set,
composed of 1000 dwarfs with precise stellar parameters estimated from HIRES
spectroscopy. For FGK dwarfs with V photometric error less than 0.05
magnitudes, or V < 9, our temperature model gives a one-sigma error of
+58.7/-65.9 K and our metallicity model gives a one-sigma error of +0.13/-0.14
dex. Our estimates of distance and spectral type enable us to isolate 354,822
Tycho 2 dwarfs, 321,996 of which are absent from Hipparcos, with giant and
subgiant contamination at 2.6% and 7.2%, respectively. 2,500 of these FGK
dwarfs are bright (V < 9.0) and metal-rich ([Fe/H] > 0.2). Our metallicity
estimates have been used to identify targets for N2K (Fischer et al. 2005), a
large-scale radial velocity search for Hot Jupiters, which has published the
detection of 4 Hot Jupiters with one transit. The broadband filtering outlined
here is the first screening tier for N2K; the second tier is a low-resolution
spectroscopy program headed by S.E. Robinson (astro-ph/0510150).
