Yeah, I am looting a lot...but I always find that I use so much ammo and get very little in return. I use the baton a lot but probably need to use it more.
At the early levels you need to use your head a bit more, lure your opponents in rather then taking them on with guns blazing. Fire a couple of shots at them, then duck around a corner and wait with your Baton ready for when they come at you. As you progress you'll have ammo and caps coming out of ears, but when you first start out you need to be a little more careful with how often you fire your weapon and at who. Save the firepower for the tough enemies, don't waste it on something your can take on with just a stick.
I also found a different trader...or someone who was willing to trade with me. But I can't find them again. I think nothing is on my map...
There's traders all over the place. Some don't have alot of caps or stuff and are called Scavengers. There's I think 6 main merchants in the game you'll come across, 3 Caravans, and then minor merchants scattered all over the map. Once you uncover the main merchants you'll have no problem keeping yourself in ammo, there'll be lots you can buy. If you have the caps of course, which really isn't a problem in this game. My first time through I ended up with something like 12,000 caps that I just didn't know what to do with.
And another noob question...Is the 'Find Dad' quest, the main quest? Is this similiar to Oblivion in that you can just pick up the main quest whenever you want?
Yes and yes. You don't really want rush into completing the main quest, just take your time. Especially if you don't have the Broken Steel addon. Like Oblivion, most of the game doesn't revolve around the main story. There's all sorts of areas to explore that have nothing to do with it, and smaller side quests you can take on. If you haven't already, be sure to talk to Lucy West in Megaton. Provided of course you haven't blown it up. As for Lucas getting killed, that does happen sometimes if approach things in a certain way but it's not the end of the game by any means.