Urgent Question Regarding Issurance of visa for Pakistani Student

[Romanchuk]

Can anyone help me out in the following info..

1- How much fund is enough to get a study visa in Canada for a pakistani student?
2- Do we must have to show our own Bank Statement or can we also attach our sponsors statement?
3- Does our sponsor have to be someone who we are blood related to?
4- Do we have to maintain a certain ammount in the bank or the flow is accepted too? i.e if a person income is almost 1800$ a month but he takes some out every month but still his yearly statement would cross 18000$.\

Kindly reply if you have the exact answer, i tried cic.gc-ing it but did not get the relevant answer!
A prompt and accurate reply will be highly appericiated.