Purple sites 1st week of flower

Nothing to worry about, the colour is due to the genetics of this particular plant/seed. Flowering this early and when stupidly small is something you will have to accept if you continue to grow autos.

as long as its ththe calyx, not so big of deal. If it's a pistil getting coloration already, better look for a pollen sac on your plants. i can't tell for certain from the picture, but you can obviously clearly see it in real life. How cold is it getting at night? As long as it's staying over 68F, should avoid purple and red colors caused by environment. Genetics just do it on their own or exacerbated by colder temperatures.