Well, my opinions are probably as seasoned as anyone's, so I'll take a crack at answering your question. I would say that a 5wt rod is probably the most popular size for trout, and that a 8wt rod is probably the most popular for steelhead. For both, I would guess that 9' may be the most popular length.
As to reels, one generally gets a reel which is intended for the weight of the rod. As to lines, at least for trout, most people probably start with a floating line, and acquire other special purpose lines later.
You may notice that I have carefully avoided mention of specific brands. Before you even thinks about brands, it is important to understand the total budget for your outfit. Stated differently, if your total budget is $200, then you probably won't want to spend it all on a rod, and then have nothing remaining for reel, line, leaders, tippets, flies, etc.
Given a $200 budget, I would probably recommend spending perhaps $120 for a package that included a rod, reel, and line, and leaders. This would would leave you $80 to purchase tippets (perhaps a spool of 4x), 2 dozen flies, some floatant, a hook file, nippers, etc. For flies, you might start with some Adams in size #14 to imitate mayfly duns, some Elk Hair Caddis in size #12 to imitate adult caddisflies, some Stimulators in size #12 to imitate adult stoneflies, some Beadhead Prince Nymphs in size #12 to imitate stonefly nymphs, some Beadhead Gold-ribbed Hare's Ear Nymphs in size #16 to imitate mayfly nymphs, etc.
Hope this helps you get started. However bear in mind, whatever you start with, no matter the price point, as you gain experience, you will likely acquire rods, reels, etc. at an accelerating pace for many years.