Can I practice as a physiotherapist after completing BPT?

After the completion of the BPT course, you must do MPT or Ph.D. to become a physiotherapist. If you finished the MPT course it will be good for your career. MPT has so many career options. Here I mention the career options in MPT. List of career options in MPT Researcher. Professor. Sports Physio

Yes, definitely. You are a licensed physiotherapist after completing BPT- https://www.shiksha.com/medicine-health-sciences/physiotherapy/articles/a-career-in-physiotherapy-blogId-19609 Refer this for more information.

Yes, you can but entry level jobs. You can move to higher paid jobs as you keep gaining experience and if you can also add an additional qualification such as Masters.