Do I need to drain the entire cooling system before swapping this in?

Yes. Plan to lose most of your existing coolant when you disconnect the old radiator. Have fresh coolant ready and bleed the system per your service manual to avoid air pockets.

Does this radiator include the temperature sensor and sender?

Radiator assembly only. The sensor boss is there, but you'll reuse your existing sender or purchase one separately if yours is damaged during removal.

Will this work with my current upper and lower hoses?

Factory hose fittings match OEM design, but verify hose condition before reassembly. Aftermarket hoses may require adapter inspection—old rubber can warp fitment surfaces.