Security and collaberation

I need to be able to author a document, send it to a client and have him fill in blanks on his end, save and return via email. Can Acrobat 8 be "programmed" to fill in multiple documents from one "checklist" document? Can document be digitally signed by client? Does my client have to have a copy of Acrobat 8 on his computer to fill documents I send him??? Will this require multiple copies of Acrobat? Will Acrobat 8 standard be able to accomplish this or do have to move up to the pro version?
 
Thanks,
Steve G.