Hi,
You also need;
1. Spouse bank statements (of last 3 months)
2. A one page summary of the financial information you are submitting. (it's a new requirement)
3. Letter of invitation, http://www.cic.gc.ca/english/visit/letter.asp
4. Your passport/study permit details.
5. Your financial papers like a Canadian bank statement, Notice of Assessment, T4.
Thanks enfield, this is really a huge information for me. Highly appreciated ur time and effort
Now, after reading your all posts again, I am realizing your problem is more about your weak financial standard in Canada (not in India).
The financial requirement of;
CAD 10,000 (self living expenses) + Tuition + CAD 4,000 (for spouse) + CAD 3,000 (for each extra person),
is applicable ONLY when family/spouse is co-applicant with your study permit application. Since she need to apply for a visitor visa in her individual capacity, the requirement of financial standard (for Canada) 'is different'. As per rules the required amount will depend upon the circumstances of the visit, i.e., how long and where your spouse + two childrens will stay. And it's here I see some problem. You are studying on a scholarship and that's applicable for one person, not for the family of four. Your property valuation of CAD 160000 (in India) + land certificates (in India) is of no use to prove your financial standard in Canada. Such things are not even part of visitor visa checklist.
In short you need; a stable source of income in Canada + one Canadian bank statement. As you are working as R.A and making an additional CAD 7,000/year (with total income of CAD 26,000). It should be fine, still I am not very sure if it's enough for the family of four in Canada.