Will I need to service the refrigerant system before installing this compressor?

Yes. You'll need to have the system evacuated by a certified technician before and after installation. This is standard procedure for any A/C compressor replacement and ensures the system works properly without contamination or moisture.

Does this come with the pulley and clutch?

This is the compressor assembly only. Verify whether your existing pulley and clutch are reusable or if you need to source those separately based on the condition of your current unit.

What tools do I need to swap this in myself?

You'll need basic hand tools, a jack, and jack stands. A/C work also requires an evacuation pump and recovery machine (certified shop equipment). Most DIYers handle the mechanical swap themselves but send the refrigerant work to a certified technician to stay legal and safe.