If I were doing it again, I would do the same thing for boiling that I did when I got my original kit. Buy a propane turkey fryer. Something like this
. It has gotten me through my first 18 months of brewing, including the jump to all grain. 7.5 gallons can get a bit close when you are doing full volume boils (sometimes I use a small second pot on the stove), but it is certainly cheap and easy.
I highly agree with Jim on everything else he said.
Welcome to the hobby, feel free to ask any questions you have. It will be easier on your taste buds if you learn it the easy way from the smart people on here.
And remember: Relax, Don't Worry, and Have a Homebrew.