(I've got a couple comics but I'll go for my main two, Foxtales and Gekkering while answering)
I've got whole playlists for my comics (both active and in development) but for Gekkering it'd have to be Tomb Boss - Catharsis and for Foxtales jump man 93 - bruh
Of the two I think only Foxtales would work as any kind of adaptation and out of tv or film most definitely television. Most of my stories were kind of made with animation in mind, so some kind of ongoing animated series of any of them would be neat as heck.
I would hope maybe teens and/or young adults. I'd honestly like to gauge the age range of my current reader base since stuff like that is actually pretty interesting to me.
Yes and no. The main mc's of Foxtales and Gekkering are literally me so it'd be like talking to myself (which I kind of do already?) but as for the other mc's it depends. In terms of personalities I think we'd be fairly compatible for friendship but if they we're self aware (like they know I made them and gave them their backstories etc) probably not. If they existed as their own individuals unaware of that then yeah I'd say I have something of a chance...so long as they don't find me annoying 
As much as it would seem tempting I'd have to say hard no. As someone who made their stories and characters with specific things in mind seeing them altered (especially drastically) would bother me A LOT. Plus Hollywood has a bad habit of sometimes completely ruining an original story and turning stuff into the complete opposite of what the original creators intended and I'd hate to be another of those. The money might seem enticing but unless there's an agreement to respect the source material then no thanks.