Is it possible that a child or person could have ADD or ADHD and autism? If so how is a person or child evaluated? And what are the signs and symptoms and how would you control it what kinds of drugs or treatments would a chid or person be given?

It is possible.

Researchers find that children with autism had a higher rate of bullying - unless they also had ADD or ADHD. Those with both disorders showed a rate four times higher than children with just autism and with children overall. They also had a higher rate of bullying than children with ADD or ADHD but no autism. Children with autism and ADD or ADHD occurs in about half of children with autism spectrum disorders.

Clonidine is of Some Benefit for ADHD Autistic Children: a trial of eight autistic children with ADHD who had not been able to tolerate neuroleptics, methylphenidate, or desipramine found that clonidine was modestly effective.
U Illinois, Chicago. Clonidine treatment of hyperactive and impulsive children with autistic disorder. Jaselskis CA, Cook EH Jr, Fletcher KE, Leventhal BL. J Clin Psychopharmacol. 1992 Oct;12(5):322-7

Cost: Darby 2003 1mg x100 = $18/month; Clonidine 0.1 mg/d is $5/month; 0.3mg/d is $15/month.