1) The selling of indulgences was an abuse, like simony, or any other religious abuse. The Church certainly never taught that Christians could "buy their way into heaven." Indulgences themselves are still part of Catholic doctrine.
2) Catholics do not worship relics. Worship is reserved for God alone. Relics are duly respected.
2 Kings 13:21
And it came to pass, as they were burying a man, that, behold, they spied a band of men; and they cast the man into the sepulcher of Elisha. And when the man was let down and touched the bones of Elisha, he revived and stood up on his feet.
Acts 19:12
so that even handkerchiefs and aprons that had touched him were taken to the sick, and their illnesses were cured and the evil spirits left them.
3) Would you distribute a Jehovah's Witnesses Bible in your church?
The Church that wrote, preserved and canonized the Scriptures over fifteen centuries (the Scriptures that Luther inherited and then edited), resisted the publication of poor translations into the vernacular.
4) Priestly celibacy is a discipline, not a dogma. In fact, married men in the Eastern Rites may be married prior to ordination, and there are some married priests in the Latin or Roman Rite. Regardless, St. Paul commends and prefers celibacy, and Jesus was celibate.
It never stops to amaze me, and at a time when real Christians in the Muslim countries are losing their lives for the Lord, that we still have arguments over scripture and tradition vs. scripture alone.