Yes, initially it will be difficult for foreign LLb holders to get jobs in legal field in Canada. However, there are 2 requirements which every foreign trained lawyer/foreign LLB holders should possess to make his/her way easy to get the jobs there. 1) You should get certificate of qualification from NCA by clearing the recommended exams & enrolled as solicitor in any provincial bar; 2) you should have canadian work experience; This 2nd requirment you can get only once you get the 1st one. I mean, In Canada without getting yourself enrolled to provincial bar as solicitor, one cannot work in any law firms or as a in-house corporate legal professional. THe situation in Canada is different from that of INdia. In India if you want to work as in-house corporate legal, you need be a practicing lawyer enrolled with bar council. but this is not the position there.
So, my advise would be first you admit your self for any LLM there in any top universities like University of Toronto, MicGill Univ, Univ of BC, Ossgoode etc. Simulteneously you can also attempt NCA exams so that by the time you complete your LLM, you can also complete your NCA requirements. After that you can get yourself enrolled with any provincila bar by complying their 10 months articling requirement. Then you can initially you can join any law firm / or any part time job in legal atleast for 6 months to 1 years which will be taken as canadian experience and thereafter you can easily get into any legal job market.
Another option would be to first forget about LLM. Just apply for NCA for its recommendation as to challenge exams and try to complete NCA exams first, (you can apply for this from India itself once you complete your LLB, no need of being present in Canada. NCA also conduct its exams in New Delhi, Please check). Obtain ceritificate from NCA and get yourself enrolled with the bar by complying with articling requirements.(for this you need to be in Canada and getting this articling is very difficult unless you have somebody to help you there in Canada). As you do you articling in Canada it can also help to like Canadian work experience with which you can easily land into a job in legal field. Any how once you reach Canada, there are so many organisations which help new immigrants, foreign LLB holders to get into job market there. University of Toronto is also conducting one special program for foreign trained lawyers/foreign LLB holders to make their transition easy into the Canadian LEgal job market.
So, onc have Canadian PR, there are thousand and one ways of securing your furture in Canada, so no need to be panic about your legal career there. Bust of Luck.
I tried to cover up so many things in one post. I hope I did it with clarity. In case of any further clarifications, please write to me.