have been wearing a leather jacket due to the cold weather here in the midwest region of the u.s., I checked the tag on the jacket and it doesn't detail what type of leather

Salamu alaikum my name is Abdul-Rahman I reverted to Islam earlier this year Alhamdulillah.  I have a few questions I wish to ask you.

1)  I have been wearing a leather jacket due to the cold weather here in the midwest region of the u.s., I checked the tag on the jacket and it doesn't detail what type of leather it is, it just says its made of 100% leather.  I purchased the jacket years ago and I'm not sure of any number to call to check what type of leather it is.  My parents who are catholic, and thus they consume pork and other haram things, told me not to worry because all leather jackets are made of cow leather.  So is wearing this leather jacket halal or haram?

2)  I'm in college and I'm taking numerous courses.  I was wondering about the subject matter of some courses.  I'm taking a roman philosophy course and in this course we read some books of roman mythology.  I found this very interesting as I was raised a roman catholic and found the truth of Islam Alhamdulillah.  But these roman mythology stories we had to read contained stories of tons of gods that had sexual relationships, drank alcohol, ate food, made war with each other, and had wives and childre, etc.  But the good part of reading these it has shown me how these same roman people reading these roman mythology books and worshipping the roman emperor could then turn around and believe Paul's lies about the trinity.  So is studying this alright.  Also in the same course were have been discussing the sexual lifestyles of the roman empire is this okay?  I know in some colleges in the u.s. they have courses about the history of pornography, part of these courses involves viewing pornography, would a Muslim be allowed to take one of these courses in a purely educational setting.  I have NO plans of ever taking a course like this I was just wondering what the verdict would be.

3)  Being in a mixed gender college in the u.s. I have to interact with females and I have talked in depth with some females, in one course their is a female I find very attractive and talked with regularly, I find myself having sexual thoughts regarding her as she dress in provocative western style clothing, is talking to this girl okay.  A minimum amount of talking is necessary as class requires it, as we have group work, etc.  But we've talked about other things like about or lives and stuff.  Whats your verdict.

4) I really wish to be married but I'm only 19 years old and my parents say that I must graduate, and get a job, and a home before I marry.  My parents who again are catholic, tell me that I should date and have girlfriends, they don't understand why I want to marry a girl soon and not go through the whole western style dating and pre-martial relationship thing.  I wish I could marry soon Insha Allah I will.

5) I've had recent problems with having to urine lots and having lots of urine drops, I've been keeping toilet paper wrapped inside my boxers to keep any drops of urine away.  Alhamdulillah I have not had any drops yet and Insha Allah I will not, is praying with this toilet paper in my boxers for protection acceptable.  Thank you.

Salamu alaikum