1. will i (spouse) be able to work?
Probably - depends of Status of Force Agreement (SOFA), but generally yes. If you work in an area that requires licensing or certification, you will likely have to go through the process. Recommend you go look into to this before you go as they may require transcripts, etc. My wife had to provide records from schools that closed 20 years ago (luckily the records still exist). On the bright side, Canadians don't generally have difficulty meeting requirements in most countries.
2. allowances ? amounts if available?
1) Foreign Service Premium - based on FSP "points" (one point for each month of OUTCAN service), so it varies
2) A form of PLD (post living differential) designed to ensure a Canadian standard of living
3) Other benefits to make up for increased costs
As a general rule, folks live quite comfortably on OUTCAN postings and are usually in for a bit of shock when they return home! ;D
3. what is the difference in rent ceiling and rent share?
Already explained by someone else. There is also a Utility Share, which is also deducted from your pay, but then you submit a claim for 100% reimbursement of all your utility charges.
4. can we get a PMQ on base as a canadian?
Depends on local policy.
5. are you allowed to leave canada with debt?
This should come up during the screening process. Normal debt (mortgage, car loan, etc) that is under control should not be a problem. Out of control debt (e.g. bankruptcy) could be a problem.
6. can we take 3 motor vehicles? 2car 1 motorcycle?
Probably, but that's a question for Brookfield.
This should come up in the screening process. Whether appropriate services are available locally will be the question.
Generally, they will allow you to access local services, but anything requiring regular travel back to Canada MAY be an issue. The dependant medical screening should address this.
You may wish to engage an accountant. The serving member is a "deemed resident" and his taxes are fairly simple. The spouse might be a deemed resident. If the spouse works overseas, there will be "world income" that must be declared on your Canadian tax return. You won't be double taxed, but you may have to pay additional Canadian taxes. Your taxes may get more complicated if you decide to rent out your house in Canada or leave children behind to go to school (i.e. have tuition expenses that are tax-deductible. On the bright side, if you leave children in Canada to attend college or university, their residence expenses are paid by the government (to a maximum).