Tell me in detail about what to do after the medical college being alloted to us thru counselling ... mean we have to 1st go to college....

If you're allotted to a medical college, then you have to reach to the respective institute within the dates announced. You have to take your allotment letter along with other documents. If you are sure to study in the same college, then you have to complete your admission process. But if you want to go for 2nd round of counseling, then you have to inform the allotted institute the same. They will keep your documents and admission letter and if u get an upgraded college in second round , then you have to again go to same institute to take your documents back and get the reliving letter and then finally go to allotted institute.
Thank you

Can you please  elaborate  your question?