You can produce text boxes, tick boxes, combo boxes, list boxes, radio buttons and check boxes. Briefly, you create the form InDesign (CS6 upwards), export it as an Interactive PDF and fine tune it in Acrobat Pro. You then need to Reader Enable the form so those completing the form using the free Reader can store the data they've added.
having trouble getting the custom icon to be recognised :O)
Ill have another go
Not sure what you're after, but you can make an image/icon a button.