Somebody here already explained very clearly about parking and everything, you may need to search.
1>Security only will allow 15 mins prior to the test time.
2>If you want to save money for parking-then park at the Scarborough town center and can walk. I did my exam on weekend so it was free at the test center and very quite that day.
3> when you enter they will give green color form at the ground floor, fill the form and you may need later.
4>officer will guide you to the exam hall. They will explain all the detail about exam.
5>You are not allowed to discuss about exam questions.
6>After the exam they will invite one by one to the interview. It will be an open interview-there is no room for interview.
7>officer will let you know your test results. check all the docs and if they have questions they will ask explanations... they will double check your entry/exit date stamped on your passport. will check your English language proficiency by having a conversation with you. Its all depend on an officer.
8>If you pass the test your online status will change to DECISION MADE in 2 days then eventually you will get Oath invitation letter.
PS-study only the official guide book. Read again and again. You can practice on websites for sample questions, I used RICHMOND library website. It is free.
Wish you all the best.