Not many. I think even Mary Magdalene mentioned more than Mother
Mary?
Same bible. Just different versions. Personally I prefer my NRSV
which contains scriptures for Orthodox and Catholics. But who is to
say Protestants dun use NRSV 'cos Catholics also use that? So you
see, it is just a difference of version.
U pray to her and u do not worship her? sounds
contradicting.
I don't find it contradicting. Just feel sad someone has to
listen to your prayers without getting any recognition. 
not Mary. Would say that Mary is just a human after all. Dont
tell me she doesnt have sins, at all? Sins are in our human nature
after all.
What does that got to do with the deity of Christ from the RC
perspective?
PS: In theology, Jesus Christ, as much as he is God, is considered
a mediator. (see Westminister Confession of Faith). In RC theology,
Mary is a co-mediator and the Co-Redemptrix.