Hello

TOEFL is just an english testing exam, itsscore will obviously help you in getting a good college but in selected countries.

You havent mentioned which country you want to study MBBS in. In some countries like Kyrgyzstan, Bangladesh, China you will not be required to give TOEFL scores (you may still give the exam, it will be a choice not a compulsion). For MBBS in the good colleges of USA, clearing TOEFL/IELTS exams is compulsory.

As of 2019 you need to qualify NEET-UG examination and score at least 50% in PCB and English in 12th board to be eligible for mbbs abroad.

I will suggest you to make a plan first, start with the institute you want to get in

After that you can check the specific eligibilty criteria of that/those university/ties

After that you cn work on those requirements (besides preparing for your boards and neet) as well as make other necessary arrangements like passport and other documents.