Just get a good store brand synthetic. Look around for Mobile1 on sale, it usually is somewhere (cambodian tire, parts source, walmart etc) but be careful to not grab the dino oil, if it doesn't say synthetic, it isn't (and if the price is under like 25 bucks a jug).
For the tranny, get Lucas gear oil. You'll probably need a few quarts so might as well get their gallon jug. The fill plug is on the side of the transmission, just fill until it pours out of the hole (it doubles as the oil level check - the official level checking procedure is to shove your finger in the hole and see if the oil is level with the opening).
To fill the trans you'll want to get something like this: