Julien-- all good advice above.
One thing I cannot stress enough is to keep using the beacon that you took your weekend course with. It may not seem important now, but this will save your life- or likely someone else's life someday due to you being familiar with what you were trained on from Day 1.
There is a myriad of beacons with all sort of functions, options, antennas, this, that.. but at the end of it all it is you being the end user that has to know its functions absolutely cold <excuse the pun>
Is A(lpine)T(ouring) for you? ..have you thought about Telemark? Splitboarding? There are SO many options & being you are at the start of this fantastic new world, believe me you will never look back at 'in bound' or resort skiing again. But it is a very expensive hobby to get started..
What ever you chose, hit up the swaps. MEC has gearswaps in November (although there will be limited Rental or Demo winter stuff for sale until next spring from the previous winter..) Some of the used sports stores have some ok experienced touring gear for sale. Make sure to buy a coffee for your knowledgable friend who is coming along with you to give you advice.
It can be a very expensive endeavour to start this exciting backcountry/slack country season coming up. I would go slow & try to keep your finger on the pulse when buying gear. Puruse the cork boards at MEC for people trying to shed gear.
There are some really good used sports stores in Golden, Revelstoke and Nelson. Also, if you are on a course or trip, do not hesitate to ask the shop you are renting from if there is a chance that business is selling their rentals towards the end of the season. This way, if you like the gear & it fits/works well get the ski number or boot number, write it down & give them a call towards the spring.
I know CMH along the interior gets rid of their guides clothes, packs every so often. While they may not have ski's with touring bindings for sale.. there could be deals. Yamnuska in Canmore has tables of stuff in Calgary each (seasonal) swap.
And- consider joining a club. B(ritish)C(olumbia)M(ountain)C(lub) http://www.bcmc.ca has free rentals of some gear on club trips & on so on. The local A(lpine) C(lub) of C(anada) has really informal meetings each month where you will meet beginners just like yourself who are curious & lookin to partner up & search for gear. Their 'Intro to Backcountry' weekends can be top notch & non intimidating with some real quality people.
Finally, try to get out with as many different people as you can throughout the season. I find that I learn so much from people from different regions of the world. The attitude of Europeans who ski 'off piste' is pretty different from Kiwi's and even different from Americans. Rope skills.. avalanche skills.. touring strategies.. it all makes you better prepared in the short & long run.
Vancouver ACC .. http://www.accvancouver.ca
Congratulations on making the decision - there's no turning back for you now.