The Bible itself (I believe) does not contain errors. Translations might possibly have slight errors in them, but not the original writings. Now some people might take a few different verses and say that they contradict or don't make scense or something like that, but usually in those cases, the verses are taken out of context.
It's hard for me to address it completely without having some actual verses to reference.
I am well aware that many books were written well after the events happen. These books were written by everyday people (famous ones, but still) like Moses, Paul, John, etc. Others were written by kings such as David and Solomon. Anyway, even though they were written by men, they were inspired by God (according to normal Christian beliefs). To put it simply, God was there and sees everything and basicially inspired the writers in what to say.
Now I've heard that some people claim that there are some flaws in the Kings James translation and all that and probably in some other translations as well. But you have to remember they are translations.
When studying the Bible seriously, it helps to a commentary or, if you know how look at the original Greek and Hebrew yourself. The good commentaries and such are written by experts the do know Greek and Hebrew and, and have of course studied a lot of the Bible and its history.
And just to let you know, in Chrisitan Colleges, Greek and Hebrew classes are quite common.