Let’s take one question at a time:
First, to get the rich purple color in the Purple Haze you will need to grow out and flower many plants. Only certain phenos will display that purple color, meaning not all of your plants even have the potential to display those colors. If you were to grow out many plants in search of the purple pheno, clone them, flower them and once you have found what you are looking for, keep the clones from that plant. Use those clones as mothers to grow out and and take clones from for future crops.
Next, the fine brown hairs in the OG Kush is not dependant on the way you grow, it is dependent on (again) the pheno type. The OG Kush has quite a diverse background and will display many different types of phenos. If you are looking for some specific quality, again, grow out a few plants from seed, take clones and once you have found what you are looking for, keep the clones from that plant and use them as mothers for future crops.
You can get seedless crops by pulling the males out before you flower. Males usually show sex before females, but not always. Download Robert’s grow bible here on this site to learn how to identify males from females. Or, there is and easier way… buy feminized seeds from Robert. They produce plants that are all females.
Hope this helps!