I'm new to this and looking for help

I’ll agree with the others: 1) pretty much all RVs are self contained, not just toy haulers. If you don’t have toys to haul, a toy hauler is not your best bet for several reasons. (2) since you have neither the RV nor the truck to tow it, buy the RV first so you know what you need in a truck. Salesmen are always happy to sell you bigger things, and will lie to you at the drop of a hat if it will get them a bigger sale. If you buy the truck first, you are at high risk of getting a trailer you can’t safely tow, a big headache as well as a money loser. If you buy the trailer first and wind up with more truck than you need, you’ll actually be better off, as the worst will be it tows like it isn’t even there, which is a great problem to have.

I also agree you have a lot to learn here, go slow, don’t allow yourself to be stampeded into any hasty decisions. There are pluses and minuses to every rig, and deciding among them calls for a lot of knowledge about them all.