hi few months ago i bought the pentax ks2 which has a built in timelapse and it does the job automatically.it makes a timelapse video in 2 words, i dont need an intervalometer for eg.or to ad the photos in lr and make a timelapse.there. i created some nice timelapses and i have the adobe premiere.so  my question is
do i need to edit my timelapses on adobe to send them to stock sites <pond five in the one i wanna send them> or send them without post editing?i am new to the whole video thing so i am not sure what the reviewers are lookin in timelapses videos apart from noise or artifacts.does anyone have a pentax camera and did you  send the timelapses videos straight from the box without edit?
     

Well, first of all I would just look at the automatic in-camera time lapse video as a preview, not something to sell. You will get MUCH better quality if you take the RAW files and make the time lapse yourself. It will also take much more time of course, but that's what customers pay you for.

Regarding your actual question, should you color grade? Well, in general, yes, but of course it depends on how it looks. You should ALWAYS color CORRECT and fix noise issues. Color GRADING is more of a creative choice, but usually something customers are looking for.

You have many fun hours (weeks, months) ahead of you to learn all this.

To expand on mr. I.D.'s comments, color grading also depends on how you post process a TL.  If you are running it through LRT Time Lapse and using Lightroom, you are essentially able to do your color grading in Lightroom with your keyframes images.  I always suggest shooting TL in raw. Far better flexibility in post.  If you are running your images directly in, say, Final Cut Pro, then you would grade within FCPX.  Different workflow there.