In the castle, in a room off to the right of the large dining hall/throne room after entering through the main door.
Right by the pet shop in Whiterun.
The Bannered Mare Inn in Whiterun.
Look on your map smart stuff
It's right next to the stables.
Go to the companions in Whiterun and do all there quests they will offer to turn you
The nine holds of Skyrim are; Eastmarch (Windhelm) Falkreath Hold (Falkreath) Haafingar (Solitude) Hjaalmarch (Morthal) The Pale (Dawnstar) The Reach (Markarth) The Rift (Riften) Whiterun Hold (Whiterun) Winterhold (Winterhold)
In Jorvaskr on the east side of the city's Residential district.
Whiterun, it's the Companions meadhall, Jorrvaskr.
You have to go to the Companions in Whiterun. After a few quests they will turn you into a werewolf.
just type coc whiterun or riverwood your choice
Go to a blacksmith forge, i like to use the one in Whiterun which is to the right of the main gate.
If you are referring to the spell 'Fireball' then you can buy that from any court wizard in a main city for e.g. in Solitude you can buy it from the Court Wizard in the Blue Palace. Also you can find the spell book in certain quests and tombs.