Do these mount at the factory fog light location without drilling?

Yes. These bolt into your RAV4's existing bumper openings at factory mounting points — no drilling or modification required.

How do I run the wiring into the cabin for the switch?

The harness is designed to route through existing factory wire paths behind the bumper and under the dash. Test-fit before finalizing the routing to make sure it clears any brake lines or engine bay components on your specific model year.

Do the bulbs need to be replaced, or do they last the life of the assembly?

H16 bulbs are replaceable consumables. The assembly is designed for bulb swaps — you'll replace them as they burn out, typically every few thousand hours depending on driving habits.