How hard is it to fix a front oil seal leak? Also my car I repossessed is leakin

What is your question?

Just took my car back from my ex husband,Now my car is leaking oil like mad. I think it is a front seal. How much do you think that would run. I know the front seal being bad is better than the back one, at least I wouldn't have to pull the motor for a front seal. It is also starting to leak transmission fluid too, what could that be