If your thinking that this is a fun hobby to do once in a while I would get a 5 weight as your only trout rod. A five will give you delicacy to fish dry flies and small nymphs etc. It also has enough backbone to cast bigger streamers and fish bigger waters for bugger fish like in the interior.
However, like most of us you will probably end up wanting more than one rod. In this case I would buy a 4 weight and a large reel with a spare spool. Then get a 6 weight as your next rod. That will cover pretty much every situation for trout fishing. If you buy a reel that can work for both line sizes you will be set. A 4 weight is perfect for all the lower mainland lakes and some smaller trout in the interior. The 6 is great for bigger fish as well as pinks, bull trout and coho.
I wouldn't spend much on a reel either, maybe $100 to $150 for something basic and reliable.
Enjoy.