Hmm... wrong teachings? Why would you want to jump to such
conclusion? 
Catholics believe that faith and good works are both important as a
christian.. not just one over the other.. You can't believe that
Jesus is lord and be mean and all and vice versa...
HOWEVER, Ephesians 2:8-9 "For it is by god's grace that you have
been saved through faith. It is not the result of your own efforts,
but god's gift so that no one can boast about it" Which means to
say that at the end, it's God's grace that we are save.. not by our
faith or by our works.
However, i think both sides get too caught up with the word
"Alone"... 
Authority of the church... THe bible is the truth, and we all agree
that.. it's the good news.. BUT one line can be interpretated with
different meanings. and we turn to the church.. IRONically, not
many people know that it's in the bible too... 1 Tim 3:12-16 "....
the church of the living god, the pillar and support of the
truth... " thats why we don't place one over the other.. we just
turn to the church because we believe that when God sent down his
holy spirit during pentecost, the holy spirit will guide the church
along the way.
And for any human civilisation with so many mistakes, the catholic
church manage to stand for so long... there's something about it...

I've explained purgatory and Mary in another thread and dun wish to
explain so please do refer there...BTW, many like to trap catholics
with the term praying... What's the definition of prayer? it's a
conversation right? We don't pray to mary and the saints.. but we
talk to them and ask them to pray for us. And this the catholics
are vey sure of... most at least... so please be fair to us.

Body and blood of christ... what's so hard to believe that the
bread and wine really turned to body and flesh? In many cases,
people have reported that the 'bread' they took have turned into
flesh... And many are kept in certain chapels in rome and all...
For display even. Scientifically, and interestingly, all bloodtype
are type AB+ and comes from the muscle from the heart.
Coincidence? With god? i doubt it. Whatever it is, the
eucharist, as what catholics call the body and blood, does come
from the bible. Similarly, the last supper, Christ said "this is my
body, take it and eat it and do it in the memory of me..." same for
his blood. I don't think the bread did change it's looks and become
flesh.. But why did Christ say that? He said this IS my body.. not
this is something like my body... Jesus is known not to play with
words... it must be so important that christ did it again when he
resurrected.
We have to understand that it's the change in looks but form... And
would anyone dare to eat real flesh in blood?
i don't think i am... 
Hope it clears the air more...