New job, looking for help figuring out taxes.

I started a new job that has two parts. We have an installation crew that puts together and replaces toilets in apartment buildings. For that work I am paid per toilet we install and the given a check for that amount with no deductions.

On the other side I do service work with a journeyman as an apprentice and make $13 an hour and for that money the deductions do come out.

So I am trying to figure out what I need to set aside for taxes for the part of my job that doesn't have deductions. Do I just take a look at the tax brackets on the CRA site and just deduct an amount based on what I think I will earn? Also what about CPP and EI is that something I have to worry about as well?