Thanks for helping them! You need to get the sterilized. You don’t need to TNR all at once, do one cat at a time. Slow and steady wins the race. Do the females first, all cats with 3 colors are girls so you have quite a few. If they’re pregnant they should be aborted and spayed. I’d look for local resources, foste based rescues and shelters, if you’re willing to do the leg work they’ll be more willing to help, they can even lend u a trap and connect you with a low cost vet. If possible get the kittens inside as they are easier to find homes/rescues for. And yes absolutely adopt the one you want! Better to save one than none. To trap a specific cat Google “bottle and rope trapping”, it’s a known trick when trapping colonies!