I don't know how much these go for now, I got them a while back.
Yes you can wire the LED's and Halo's to the signals. They will be a little dimmer since they will be sharing the 12v with the signal bulbs. They will alternate when you put your blinker on. And as long as you have your orange turn signal bulbs on, then your halos and led's will be on.
What I did is disabled my DRL's and then you can use the light switch and move it one over so the orange bulbs come on and then you can turn on your fog lights.
