B.Sc

You are eligible to do MBA or M.Sc/ PG Diploma in Hotel Management after B.Sc Statistics. There is no additional eligibility requirement for MBA. For candidates who have completed any degree other than Hotel Management during graduation in some institutes may require to enroll for a bridge program of few weeks duration prior to the commencement of the Masters program in Hotel management.

First, decide the university from which you want to study and country were you can go. You should be ready with your passport and visa. You can check the previous record of that institutions.

You can go for B.Pharma.

It doesn't happen like that. First, you have to find a company who is offering you a job there. Now it depends on the company entry requirements, whether they ask for a fresher or a person with 1, 2 or 3 years of experience.
You have to check job listing on net and apply for it. Once you get an offer from there, then you need to clear IELTS paper in GT module. Thereafter, you will get a visa.

Yes, you can. You should not have any backlogs.