First off, you should be able to use the compressor without the goo, but I am not positive as I have never used the one in the Leaf.
Personally, I would recommend a device like the following: https://www.amazon.com/gp/product/B01LZ ... UTF8&psc=1
The one with the air compressor is what I recommend, then you have an air compressor and something that can jump start your car if needed.
Also, a note about the goo that Nissan provides, if you use it, you will have to replace the TPMS sensors when you change the tire and they aren't cheap. Fix a Flat is compatible with TPMS systems and doesn't damage them, so I would recommend using that instead.
Another viable option it get a flat repair kit like this one: https://www.amazon.com/Tooluxe-50002L-U ... repair+kit
Do yourself a favor and be sure to get one that can be used with the tire still on the rim at least, if not still on the car.