There isn't notoriety in Skyrim. Instead, a bounty system exists for each hold. You can get rid of your bounty by going to jail, paying the bounty, or paying off Delvin of the Thieves' Guild.
Go to jail, pay them off or try to complete missions with a bounty. (Which is near impossible)
You need to join the Thieves guild, and talk to their members.
They will attack you on sight, yes. You may be able to yield, though.
Just like children and other NPC's You cant kill it but if you hurt it you will gain a bounty
They are sent after someone sees you commiting a crime or a murder. On their bodies will be a bounty note signed by the person who sent the thugs after you.
Beast Form fades away in 150 seconds.
you can go to does temples around the of skyrim and pray and it cure all disease or drink lots of cure potions just click on the shrine and pray
Talk to them and say (I wont be needing you anymore) Or something along that line
Beat the companion's quest line, ask him to be your follower, lead him out of the city, kill him.
You need to go to a train station and talk to the telegraph operator and you will have two options, either you pay the price of your bounty or if you have a pardon slip (attained by defeating gang hideout's) you can give him that and not have to pay off your bounty
Either wait 24 hours, then the guards shouldn't kill you when they see you, or live in the woods for a few days, a bounty collector will come to you, DONT go back right away after you talk to him, wait a day or two for him to tell the town.