All I know is Islam doesn't allow representations of Muhammed the prophet.
"Theology" is the study of gods, (from theos - Greek), or more generally the study of religion or spirituality. Those involved in such studies could be termed 'theologists'.Religious studies or philosophy of religion are terms for the study of religions. I don't know of a term for the person who studies religions. A theologian studies gods and not all religions have gods.
no, gods always had some kind of form in all religions
No, but then all the major religions make the same claim for their god(s). The difference in other religions is that the Greeks had many gods, most modern religions have only one.
Unless you are using Gods from actual religions, NO. If you are using Gods from actual religions there all sorts of rules to follow to prevent insulting the followers of that religion.
All gods are real to their own followers, but may be considered false to followers of other gods. So, the concept of 'false gods' is, to some extent, a theological one. The more intolerant religions may call the gods of other religions 'false', while those religions that practise tolerance merely say, "we do not believe in that God (or those gods)."
Different mythologies have different names for their character of god or gods. Hinduism is the only one of the five 'major' religions to be 'poly-theistic' (believing in the existence of multiple gods). An overview of the main gods in Hinduism can be found at: http://www.sanatansociety.org/hindu_gods_and_goddesses.htm
All religions believe in God or gods. They worship God or gods. They teach truth, honesty, love, justice, sacrifice, service to human beings, brotherhood and doing the right.
The gods all were born by two BIGGER gods. Their parents were Rhea (Mother Earth) and the sky (which name i do not know.)! Hope i answered ur q's.
All theistic religions believe in a god or gods.
All peoples have had religions with one god or several.
Romans after their god earth atleast that's what i think but i know all the roman gods started from greek gods