Do these bulbs come with the lights, or do I need to transfer mine from the OEM housing?

You'll transfer your existing bulbs from your factory tail lights to these housings. The bulb sockets and wiring connections are the same as OEM, so swap is straightforward.

Will these fit without modification, or do I need to drill or cut anything?

These are direct replacements designed for factory mounting points. No drilling, cutting, or brackets needed — unbolt the OEM lights and bolt these in their place.

Can I see through the smoked lens to know if my brake light is working?

Yes. The smoke tint reduces brightness but doesn't block visibility. You'll still see the red glow when brakes are applied; the lens simply filters it through the darker finish for that modern look.