Yes, there are repeatable daily quests and daily PvP quest. Two of the daily quests areas is on the planets Ilum and Hoth. We'll be fighting over control of Ilum for lightsaber crystals for example.
As far as repeating quests again in order to gain light/dark points, I think it will depend on what type of quests your talking about. In this story driven MMO, they aren't going to want you to relive your class quests that define your personal story and are persistent throughout the rest of the game, over and over again. However, you will be able to gain light and dark points in flash points, world story quest lines, space combat quests and others, as there are lots of shared story dialogues in these to choose light and dark outcomes and some of these quests are repeatable. Once you decide to safe or not safe that <fill in npc name here> in your personal quests, your not going to have a chance to change or relive that experience. You can tag along with someone else's personal experience, but you'll have no say as to what choices are made and therefore not gain any light or dark side points for story dialogue you aren't apart of.
There will be lots of chances thru other quests all throughout the game to change your side, but I can almost guarantee it won't be via purchasing token/coins to do so. That also doesn't fit with their story driven MO.
I agree that they may have npcs that offer you to do repeatable quests that are more inherently good or evil so you can tweak which way your alignment falls, but I'd be surprised if Bioware has dark and light quest givers or refer to them as light and dark NPCs/Vendors. But this is all based on the information I've seen so far and could change later.