tax write offs

Good day everyone, Can someone explain the benefits of claiming depreciation on my Rental House? It seems to me that claiming depreciation might help me save on taxes for this tax year, but then I'll have to make up for the tax savings when I sell my Rental Property down the road. Am I...

If I borrow say 5000 at 3% and deposit the money into a TFSA for investment purposes, will I be able to write off the interest payed on the principle? My understanding is that this works with margin brokerage accounts. Also do you have any advice on how (what kind of paperwork) to keep track...