Well. at least your keen. I dunno what a red pass is, but I worked at Pearson for 2 years in 98 and 99. I am sure the system has changed post 9/11 for obtaining clearance. I will not go into detail for obvious reasons but you should have no problem obtaining clearance as long as you have stayed outta trouble as a minor. Second, you gotta be outta your mind to be a ramp rat. All weather conditions, snow, rain, cold damp, cargo holds that smell and stink, the fumes, burnt jet fuel and diesel from the vehicles. I hated the work, Loved the aircraft. If you do the job, I would not do it for long. You will hurt your back for sure. I don't care who you are.
I was with Hudson General, worked at T1 and T2 for Canada 3000, Olympic, KLM, Martinair, C3000 was our biggest contract. It was tough in the winter months, like today, -20, could you go outside right now for 3 hours and un-load and load an aircraft? It's tough. For me, it was rewarding, I saw some beautiful aircraft, chatted with pilots ocasionally. Talked to the maintenance guys. It was alot of fun, but I warn you, a tough go. If you want the job, go for it, but the cold is pain in the rear.