Can I just use AN micro, grow and bloom? Or do i have to buy some more nutes. Also should I use Bud Candy or Mollases during flowering?
Personally, I would add Bud Candy since it's a great addition to the system, and I wouldn't grow without it. I'm using pH Perfect nutrients right now, but I started out with what you used and it worked really really for me. I say, start with what you can, and then move on up if you like what you see. My experience with AN is that it only gets better when you start using their full systems.
Think of base nutrients as your meat and potatoes. Everything a growin' boy needs. They're a balanced diet for your plants, but not much more. You can absolutely grow excellent plants with nothing more than base nutrients. The question each grower has to ask themselves is "what kind of growing and what kind of harvest makes me happy?" Many growers, I'd venture to say even most growers, look for more than what base nutes alone will do. Some say "additives don't make any big differences" but that's simply not true. Some additives are better than others, but any decent additive will create a noticeable effect. My advice is to use what you've got. If you have Bud Candy, use it. If not, don't worry about whether or not you should. The base nutes will get you from A to B. See how you like the "B" you end up at. Then, next grow if you want use the same thing, try something else, throw in some additives, whatever. Play with it, experiment and see what is the best balance between cost and results in YOUR BOOK. Don't listen to me or anyone else if they're telling you should or shouldn't use this or that. It doesn't matter at all how much anyone but YOU are satisfied with how you grow. I grow the way that makes me happy, you grow the way that makes you happy, everyone else grows the way that makes them happy - everybody's happy! (Except the people that aren't happy unless they're telling people that disagree with them that they're wrong. But we can't force them to be happy so there's no point in worrying whether they are or not.)