IS WITH A CONJUNCTION 

I WANT TO DO TO INDIA WITH HER

No, 'with' is a preposition. 

The sentence provided by you is grammatically incorrect. In case, you meant "I want to go to India with her", 'with' is used as a preposition.

(Due to paucity of time, it would not be possible for us to answer all your queries. However, three of your questions have been answered by us. Please try to answer the rest on your own and revert to us for feedback. We will be happy to help you suitably.)