Welcome & Enjoy
Hi,
Welcome to India, I am trying best to answer your questions.
1) How do I get to the office at Empire Complex in Lower Parel from Trident Hotel in Nariman Point? By taxi or auto rickshaw? How much are the fares? How long does it take?
Mumbai is divided into two parts for Use of Auto Rickshaw or Public Taxi (in Black and yellow color). Auto Rickshaw are permited in Suburb and till Bandra, while Taxis ate permitted every where in Mumbai. Here is link for
Taxi Fare (Yellow Black color) for Mumbai. But I will advice not to use these taxis as there are chances of cheating (Some times meter tampering). You can Hire a privet cab like
Meru,
Hertz etc. Ask your Hotel to book one for you. These privet cabs are not expensive. These will also give you the comfort of AC.
Your both Hotel and office is in so called Town area, So you will not spend much time in Traffic I Hope

).
2) Any fast food such as McDonalds or KFC near the Hotel? or any food that suitable for foreigners? The water is no good for foreigners?
There are many fast foods joints avaiable near your Hotel and also to your Office. Howerver there is on shopping mall,
Atria Mall near to your Office, where you will get these kind of hangouts and also the shopping.
Avoid out side food, You are welcome to try Indian Food only if you have office colleague to guide you in that area.
Couple of places where you can try Indian food which will suite your test (not spicy) is
Mahesh Lunch Home (Fort Branch), BambayBlues (at
Kala Ghoda). I had been these hotels and they are very good. At least I can recommend you. Both are near to your Hotel.
Since you are for week or so, always used packed drinking water.
3) Any other advice? It's my first time to India.
Ask your hotel to book Taxi for you from Airport to Hotel.
Manson (Rainy season) is starting so you might experience some shower, Avoid eating and drinking to unknown places (roadside). always ask your Hotel reception in case if you need any information. People in India are friendly, Sometimes they might become very friendly which will annoying to you. Do not travel alone during night hours.
Enjoy,
Kedaar