We present the results of time-series photometric analysis of about 15000 stars observed by the Kepler space mission. We measured star-spot rotation periods of 2275 active stars as a function of spectral type and also discuss the distribution of their amplitudes. We examined the period-color relationship for all the Kepler field rotational variables and interestingly found that the same relationship holds true for both early-F and A type stars. This result is not consistent with the very foundation of the PtM relationship. Through visual inspection of the periodograms and the light curves, we identified 16 stars that have previously been mentioned in the literature as red giants with solar-like oscillations. In addition, we found 72 new candidate solar-like oscillators not previously mentioned in the literature. The basic physical parameters such as masses, radii and luminosities of these solar-like oscillators were also derived using asteroseismic relations. We have characterized several non-radial pulsating variables such as delta Scuti, gamma Doradus and hybrid stars and the relationship between two newly constructed observables, Energy and Efficiency have also been studied for the large sample of non-radial pulsators. Our results also support the idea that the present observational instability strip should be extended to accommodate the newly discovered pulsators.