Here are different things I carry, or used to carry, in the Frunk, with (comments)
First aid kit (never used it)
Battery operated tire inflator (often use it just to keep the tires topped off, and have used it several times when tires got nails in them so I could get to the tire store to have the tire properly fixed)
Tire plug kit (never used it)
Tire repair kit (have used it with previous car and with my Model X until I was informed that using a plug kit like this would void the warranty on the tire, but I leave it in the Frunk just in case, but would never use it except as a last resort. It is very difficult to insert the tire plugs into a tire that is still mounted on the car. These are considered temporary, but the repairs I made with these lasted a long time and I never had the tire "properly" repaired)
Jack pucks (in case you are at a tire store that does not have them)
Tesla Mobile Connector, with various NEMA adaptors (I have never used for an emergency, but use from time to time when visiting family and friends. I would not carry this, and the stuff below unless needed for this purpose)
NEMA 10-30 Extension Cord (for common dryer outlets. I used to carry one of these until I got the Lectron, below. I got the three wire cord as it is less expensive and not as heavy as a NEMA 14-30 cord.)
120 volt 12 gauge Extension Cord (just in case. Have never used it)
Adapter cord to convert NEMA 14-30 dryer outlet into NEMA 10-30 outlet (Some houses have 10-30, some have 14-30 dryer outlets. Use this with the three wire extension cord above)
Bag for these cords:
Lectron Tesla Extention cord like this (I only carry this now. Expensive but makes it a log simpler)
Note: I don't think the Tesla Mobile Connector and these cords are useful for emergencies, but it is nice to have them just in case. I would not bother with them except I now use the Mobile Connector and the Lectron Tesla extension cord about 4 times a year when visiting friends and family that live in the boondocks and charge from their dryer outlets every night just like at home because SuC is about 50 miles away.
Jumper battery (for others) (have used it several times on ICE cars)