yes
yes
Yes, you need a visa to enter Indian territory.
No, a Jamaica tourist visa is not needed for a Ghana passport holder while visiting for up to 180 days. If staying longer a tourist visa is required and the passport holder's passport must be valid.
No, he needn't.
no all you need is just your country passport
Passports are needed for most citizens to enter countries around the world. Irish nationals who are visiting Jamaica do not need a visa, but do need a passport to enter the country. Grand Cayman requires a passport and a visa if the trip is going to be beyond 10 days and its for business or 60 if you are on vacation. Mexico requires a passport and no visa if the visit is less then 180 days. Haiti requires a passport but no visa if trip is less then three months.
If you have a European/Italian passport, you can enter Mexico without many issues.
I'm adding details to my own question for clarification - I am an American citizen living in America wanting to study in Spain, however, I have an Italian passport and I believe but I'm not entirely sure that I have Italian citizenship? through my father who is an Italian citizen, but i have never lived in Italy so do I need a visa on my American passport or is my Italian passport without a visa enough to study and stay in Spain?
You need a passport to get a visa
jamaica
No, you don't need anything more than your passport.