In order to clear your doubts, I would bring forward to you the structure of MBBS Curriculum. The course is divided in 9 semesters total lung 4.5 years + 1 year of compulsory internship. Service bonds may apply to candidates depending on state terms and conditions. The 4.5 years are divided into 1 st year, 2nd year which is 1.5 years, 3rd year and final year.

Income which you have reforged is actually a stipend given during the internship year. MCI has called for uniform stipend regulation and if its implemented then all interns shall receive a same stipend. In today’s scenario AIIMS and JIPMER provides the highest stipend  with 23000. 

The 4.5 years you shall receive no monetary amount but it should be noted that the heavy subsidy that government pays to your tuition fees is in equal the income you get if you thing otherwise.