Canada

Hi, complete your 12th with equally good grades like in 10th, take the IELTS and start applying. If you have a good profile you can expect scholarships from the universities or take an education loan from an Indian bank.

Hi,
Universities may consider the IELTS score if you have a good academic profile. Here, it is important to see what your academic percentile is. Also very important that you check with the universities .

Hi, different universities would be having different entry requirements. For most of them, 70% and above is required.

Hi,
There is no MCA degree abroad, this is awarded by Indian universities only. You will find similar degrees which would be termed as MS or PG Diploma, etc. Canada is very competitive, good for you if you don't have backlogs. Higher ranked universities require at least 75%.