Thanks for all the help that was given. I hope that I can handle this myself, I'm sure willing to give it a try.
I going to get the things, that I think will be needed. Please let me know if their is anything else that I need.
Since I do have an older Mobile Home, I understand that Plastic is the thing to deal with.

1)Wax ring- Are they all the same size?

2)Flange - if needed, what is the best for me to get?
Are their different types for use in Mobile Home Trailers?
Will I need some type of glue?

3)Flange bolts - I need 2 that are Brass?

Pray that I don't have to replace floor.