to answer your questions in a quik way..use the search option..there is alot of info on this with dressing up leather...
or you could browse the gearcare and distressing room.
I highly recommend Lexol leather conditioner for your Todd's jacket. It's perfect for lambskin. I just treated my wifes lambskin jacket with it. I also have a Todd's jacket, just over a week old. I don't plan on treating it for a long, long time.
The first thing you'll want to do is test it on a non showing spot like the inside of the storm flap. You apply with your fingers and rub a light coating and allow it to set for a day or two then buff off with a towl. Some people have had issues with the regular pecards not absorbing into the lamb and remaining tacky but it worked wonders on my lamb jacket. I think the trick is to apply thin coats and give it time to set in.