Do i really need an attorney?

Yes. There is no way you can adequately represent yourself.

Can the 24 yr old guy who is sending and receiving nudes from my 17 yr old male friend get arrested for child pornography?

Yes. It’s a felony to sext with anyone under the age of 18.

Can my 17 yr old friend get in trouble for sending nudes of himself with his face to a 14 yr old?

Yes. 100% illegal and it’s called child pornography.

Can I be indicted under the same charges that was no billed?

Yes. You can be indicted after one no-bill.

Can someone get arrested coming through immigration back to the U.S. based on a bench warrant issued for child support?

Yes. It can be expected. Criminal history checks are run when people enter the U.S.

Simple battery and Criminal Damage to Property - 2nd Degree

Stop freaking out. Cal a few lawyers and set up consultations either on the phone or in person. Your lawyer will help formulate a game plan.

How is it legal when we they can get charged with second degree child molestation?

You cannot consent to any sexual contact. Therefore it is illegal.

Should I plead not guilty or take the deal they give and what punishment am I looking at

From the facts you posted it sounds like you have a good defense. What deal have they offered you and what advice has your attorney given you?

Shooting someone without justification is by definition an aggravated assault.

An experienced lawyer should be able to get the case dismissed and get his criminal record and the clerk's record restricted.