Have you replaced the batteries in the remote yet? If so, I would ASAP. Good news, partially at least, is if you can start/drive the car, the key is still recognized by the vehicle. Can the remote lock/unlock doors or open rear trunk?
I don't recall when Porsche switched from levers to electronic switches for trunk releases but I think it may have been '02. Do you have pull levers or switches for the frunk/trunk releases on the driver's door sill? If levers, can you operate either lever in the driver door sill? If neither, like it's locked, then the lock out device hasn't released. If switches, do you hear any sounds when you push on either/both?
Also, there is an emergency access cable for the frunk. Previous owner may have routed it behind the tow plug in front bumper. Pop it out and see if there. It looks like this:
If not behind tow plug, you'll need to fish for it behind wheel well liner of right front tire... it'll be tucked up behind the headlight pod. Easiest way is to remove wheel and liner. However, I suspect if you have wheel locks still on, then the key is in frunk. It'll be very tight but you need to pull back the wheel well liner (there are a few double-plunger clips and a 10mm nut IIRC then feel around for the wire shown above behind the headlight .