Peeing / Pulling/Yapping/Jumping

Question
You were kind enough to help me before when I wrote about trying to housebreak my puppy when he had a UTI and you said to write again if I still had any problems.  Well here goes.

My 8 month old cocker spaniel and I have been together for a little over two months.  He had a UTI, an ear infection and he's been on antihistamines for weeks because he has allergies/hay fever ever since I adopted him.  He's stopped peeing in the apartment and on the couch but going down the 3 flights of my walk-up building is another story.  I was carrying him down but 4/6 times a day, and he's almost 20 lbs. now was killing my back and my knees.  As soon as we get outside my apartment door he starts to get crazy and starts yapping and jumping around.  Then he either squats and pees right there in the hall or on the stairs on the way down.  I've tried everything, a firm "No", sticking his nose by it and scolding him bad puppy, a noise, giving him treats outside when he pees or shits.  I've also tried letting him go down the stairs on his own without me holding onto the leash because I thought that maybe since I wasn't quick enough to keep up with his racing down the stairs that was the reason he was peeing inside but I'm afraid when he gets to the bottom before me someone could open the door and out he'd go because he goes down the stairs at such breakneck speed.  And he's yapping all the way down as well which I'm afraid my neighbors might complain to management about.  I tell him to be quiet I even talk to him but he continues yapping and not so quitely.  He does this on the street too sometimes but I think that's because he always wants to go to the park.  I just don't know what to do about the peeing or the yapping.  He definitely gets to go out enough, 4 to 6 times a day and not just in and out.  In the morning I try to take him to the park when so he can run freely before 9 am, New York law.  He runs anywhere from 30 min. to 90 min. with his friends, taking time out to squat and do his thing over and over.  During the other times out we walk anywhere from 4 to 10 blocks total each time so he's definitely getting plenty of exercise and places to do his thing outside.

On top of that he pulls so hard I think he's going to choke himself.  I did all you said about holding the leash, getting the choker chain, not moving if he doesn't stop pulling and nothing seems to be working.  Today I ordered a harness and a 5 in 1 leader leash but if you have any other suggestions I would appreciate it.

He also jumps up on everyone.  I say "No" and pull his leash but that doesn't seem to stop him.  The fact that everyone says "Oh it's okay, he's so cute" and then they start playing with him doesn't help either.  When he jumps up on me I give him a slight push backward with either my hand or my knee.  Doesn't seem to stop him either.

I love him to death.  He's extremely affectionate, playful and funny and his kitty brother and sisters are crazy about him too and him them, but I've got to break these habits now and the hall/stair peeing and yapping could get me in trouble with my landlord.  Please can you help?  Also will any of this change after he's been fixed?  Thank you for your time.  

Answer
Neutering is no cure all, but it does help with many problems.  You have your work cut out for you.  Did I suggest the head collar?  The leading brands are Promise,  Haltie, and Gentle Leader.  They have a
strap going around the dogs nose looking something like a muzzle.  They work
by pulling the dogs head around.  No other way gives you such great control
with so little force.  The prong collar is now a dangerous relic of value only
for its macho looks.  Do not consider using one without hands on instruction
from somebody with plenty of experience with them.

Make him stay at your heel on the way down the steps.  Don't let him stop.  with him at your heel, he has to keep moving as long as you do.  As long as he is moving, he can't stop to pee.  

You may have to be a bit possessive of him.  He is your dog, and if you don't want him being rewarded with petting for jumping up, it is your right.  He may find jumping up in the head collar unpleasant too.  

Obedience training is a big help too.  A good book or class helps build the correct relationship with the dog.  Keep at it.  Some dogs just are not easy.