Puppy won't stop barking?

Our 2 month old puppy lives in a play pen and we are still pad training him, and everytime we let him out because we feel bad he pees everywhere. When we don't take him out he barks hours on end. I don't want to encourage his behavior of barking but if I don't walk over there to sit with him he seriously will not stop barking. What do I do?

Sound's that is a big problem of you. Don't worry about that I know there's a lot of training for that if you look in the internet and follow those instruction you will succeed with this problem! Also on my based experience It's normal for a puppy to act like that and he need more attention buy him a treats and every time you command and he obbey give him one, at his age that is the right time to train your dog because once he follow your command he will follow it again just give him a treats every command that he obbey good luck. .

2 months is 8 weeks, how long have you had him? Of course he's still piddling everywhere it's what puppies do because they don't know any better and it takes time for them to be able to control their bladders. Average time to be reliable is around 20 weeks but that is with you being watchful and taking them outside after meals, on waking and staying with them until they go.
Also playpens are intended for use as a place of safety when you're unable to watch them. They are not intended to be used for the majority of the time. If he's barking for hours on end he's no doubt bored and looking for attention and who can blame him.

Put yourself in your puppy's position. In a small space the majority of the day = bored, bored, bored.

What would a baby do if left in their cot for the majority of the day? They'd cry. Your puppy is doing the equivalent of this.

The pen is for periods you can't give him your full attention, not for 'living' in.

Of course he does. It's what puppies do. Take him outside, or take him to his training pad whenever:

He wakes up
He drinks
He eats
After play

and every half hour or so in between until he knows where it is acceptable to go

Puppies are great fun, but also frustrating. Time, patience and perseverance are the key.

Puppy is being really good and peeing when he goes out of his confinement and not in it. It is up to you to take him to the garden immediately. You can't have had him for more than a few days. This goes on for months. What did you expect?

It sounds to me that your puppy is distressed.
An 8 week old puppy needs to be with you for a large part of the time so you can teach him what he needs to learn, not be stuck in a pen for the majority of the day. No matter how many toys he has he would much prefer to play with you and have your company.
I have just taken an 8 week old puppy and although you have to be careful where you take a pup this age, there is no reason why he cannot learn to ride in the car, be taken in your arms to visit people, house trained, lead trained etc., etc.
I do not have a puppy pad in the building. My pup has a secure garden and relatively free run of the back of the indoor space in the house to play in, with easy access to outside. I watch him carefully and take him out at regular intervals many times during the day to toilet. At night he goes into his bed (a secure crate with newspaper at one end and his bedding at the other) He has not wet his bed once (yet) and I wake up very early at the moment to take him out in the morning. He has only had two accidents inside the house and I blame myself for not watching him close enough. At 8 weeks he is obviously not able to hold himself for long, but he is learning.
It is hard intense work for the first couple of months, but this early work and socialising input is so worthwhile and will reap benefits in the longer term. I feel it is so important to make this time for any puppy during the early weeks/months.
The most important thing is that you must be there - to get to know your puppy and build a strong bond and I believe it to be vital to create a regular, predicable routine and safe environment for him. I am endeavouring to show my puppy at least two new things a day in as stress free way as I can. At this moment he is laying by my side on the settee dozing. When OH and I go to bed puppy gets taken outside to wee and then into his bed in his crate. He mutters for a couple of minutes, but then settles down and sleeps until morning