Do these bolt straight to the factory locations, or do I need to drill?

These mount at factory points with no drilling required. Test-fit before you commit to ensure alignment with your bumper cover, but the bracket locations are OEM-spec.

Are the LED daytime running lights always on, or do I need to wire them separately?

The DRL function is integrated into the assembly and runs on its own circuit when you turn on your headlights. No relay or extra wiring needed — they come ready to operate.

What about the low and high beam bulbs — do they come installed?

The housing is delivered assembled, but bulb type and installation details depend on your vehicle's original configuration. Confirm your bulb type with your owner's manual before install.