What is wrong with our refrigerator?

We have a Maytag model RTD1900DAB refrigerator (which I believe was manufactured in 1994) which has a freezer at the top with an ice maker inside. We have had frequent issues with the ice maker inside the freezer but very few with the freezer or refrigerator themselves. On a regular basis, the ice created by the ice maker will freeze into one large block; we will then pull the ice box out, melt the ice out and melt the ice frozen inside the tube which pours the water into the ice maker which then fixes the problem. Last night, we discovered that the refrigerator was very warm. We pulled the bottom vent off and vacuumed the dust and dog hair out from underneath the refrigerator, closed it back up, then gently pulled the refrigerator out and vacuumed behind it removing the dust and dog hair there as well. We pushed the refrigerator back and were careful to make sure the cords were still plugged in and in tact. We also noticed at this time the ice was frozen in a solid chunk, so we melted it and cleaned that part of the freezer as we usually do. The freezer was still very cold like it should be (still is this morning too), but no change in the refrigerator temperature. In addition, we noticed that only one batch of about six ice cubes was made overnight (which isn't normal). This morning, I noticed that a lot of water is dripping inside the refrigerator now. What could be going on? I can't imagine it's the seal on the refrigerator or freezer door, because it's a sudden problem that's come up. I'm only a 24 year old woman so I don't know how to open the compartments up and check any of the coils. I don't know how this particular refrigerator works but it seems to me that the problem could be with the freezer needing to be defrosted as there is a light frosty deposit on the back interior of the freezer too. Please help! My mother has said that she will probably invest in a new refrigerator soon since this one is so old, but in the meantime are there any quick fixes for this refrigerator?