Faraaidh and Sunnats of ghusal

Q: I had taken ghusl and washed my whole body, but I forgot to do wudhu and offered jumuah salaah. Is the ghusl sufficient for wudhu or will I have to repeat my prayer?

Q: Girl has been baaligh for about 5 years. She remembers being particular about doing ghusls from her menstruation but now shes getting doubts that sometimes she might have got yellow discharge in her menstruation days in the first few years and she didnt do ghusl again because she used to get yellow discharge in her paaki days (as white discharge when drying up can turn yellow) but now shes getting doubts and she used to have a bath eveyday (like washing her whole body) but cant remember if every time if she washed her nose and gargled so now how much qadha namaz should she pray coz her ghusl might be done at the wrong time.

Q: I met up in an accident 3 days ago. My leg is injured and has a cast on it. One night I had a wet dream so now ghusal is compulsory on me. How do I take ghusal and pray salaah?

Q: My wife has dyed her hair on my wish. She is advised not to wash her hair for 3 days (she can do masah). How can she do Ghusal if needed? Can she do masah of her head while she washes her whole body during Ghusal?

Q: Is niyyah for ghusl sunnah?

Q: If a person made ghusal and thereafter notices a small bit of nail polish on their nails, will they have to repeat the entire ghusal?

Q: In a case where one was not aware that the earrings have to be removed for ghusal (so that water reaches that area), what should she now do about her past salaah etc?

Q: How should one ensure that water has reached the inner part of the ears during ghusal? Is it sufficient for one to make khilaal of the ears?

Q: For ghusal to be complete, water should reach every part of the body. If a female is not wearing ear rings, how should the water reach inside that part of the skin of the ears? Someone told me that a female should use a pointed thing like a needle,or something and make it wet and put it inside the pierced part. Is this true?

Q: Is ghusul valid with a pain patch on if it was forgotten on the body? I only realised it was on my back hours later.