As far as housetraining, consistency is key! Put yourself and him on a schedule. Just a note, he may tear up the disposable piddle pads, mine did. I switched to washable piddle pads.
As to whether or not you should get him neutered, there is no reason not to. I hope you don't plan on using him for breeding, there are plenty of pups in the world, no need to add to it with an accidental pregnancy. Plus, it's better for him as his body won't be yelling at him to find the nearest female in heat. If cost is an issue, go to
www.friendsofanimals.org to find a vet near you who will take the low cost neuter certificate you buy on their website. Or look for other low cost alternatives in your area, ie, local humane society.
Make housetraining a positive experience. Never yell at or hit him, and don't rub his nose in it. Calmly clean it up and take him outside. Praise, praise, praise when he goes outside.