Fees and landing inquiry

[natoskiii]

Hello,

I'm applying for Federal Skilled worker immigration and currently I'm in the pool
1) Is the only fees I'm going to pay is the visa fees once I have been picked up from the pool?
2) How much is the Visa fees?
3) How much time do I have for landing?
4) How much time do I have to stay in Canada after I get the Visa for Citizenship?
5) Is there any restrictions for the number of citizenship can anyone have (as I have 2 already)

Thanks,