You might need 2 trolling bags depending on the size of your boat and how slow you can troll.Amish outfitters is a good brand.
I like Diawa line counter reels and Diawa wilderness rods.Thimk each rod/reel combination is around $150.So need 2 to start and eventually 4 poles.Think Diawa reels come in 47 or 27 size.We use the bigger 47 size but alot of others like the smaller 27 reel.
Will need rod holders too if you don't already have them.They come in a wide range of brands and costs.
If eventually buying inline boards,I like the yellow offshore brand and upgrade it with the tattle flags that drop down on a hot.Cost about $50 per board.
Then gotta decide if want braid or mono.But if going to run dipseys then braid is best and get a utube video on how to calibrate rods.
Good luck.The lure buying for trolling never ends.