Got some questions before heading to the island!!!

Hi people Im a n00b and kinda worried and anxious about medschool. I got some questions:

1) Should I buy the required textbooks and ship it to my house before I head to the island? Or should I wait and just get it when I get down there?

2) MUA did not sent me a tuition bill or the expenses I am expected to spend over the course of the next 4 years, what should I sent to my bank to get a loan??

3)Is $150, 000 be enough for the program? If so I might not get a loan so I dont have to bill any interest, and get a loan later on until I really need it?

Thanks in advance people