Will any glow plug igniter work on any rc car?

yes

Where the heck does the charger plug into

if you get a rechargable ignighter then you plug the charger in where the glow plug goes (just like a glow plug)
if you dont get a rechargable then you dont have to worry about charging it you will just need to replace the battery

what losi just said [8D]

i dont like the hotshot- mine wore out to fast hows yours holding up?

so far so good last forever

ive had that same exact ignitor for about a year now never fails me