CV Joint broke. How do I fix that?

I've had my car for about 2 years now. At first we noticed a pretty bad oil leak, and fixed it. Found another[my valve cover seal], fixed that. We've noticed noticed 2 more since then, and I have an exhaust leak. My left rear axil fell off as I was getting on the highway one day[all the bolts came loose and fell off]. And now just recently my CV Joint fell off[bolt bent and broke it off]. We can't really seem to get some of the other bolts out[as if they were made to stay], and have been able to slide the CV Joint back on most of the way. Do we have to take anything off to get on all the way??? :/  
I know I need to get a new one, but we're trying to put this one back on just until the new one comes in.
Any advice would be helpful! Thank you.