Doesn't sound like you think it should could be a lot of things, or could be how the car sounds. The first thing you should do if you just bought it is find another 93 and listen to how it sounds. Second, the clicking noise is actually a common sound w/ the e36, but generally occurs in colder weather. The problem is sticky lifters. To more thoroughly answer the question, we need more details.
As for is it the same? No. Its a different engine. The procedure is the same, but the how to access and measurements will be different, as its a different engine. Also, only you can tell if you can do this. If you can change the spark plugs then you should be able to do this easy enough, but you'll need to make sure you have the right tools.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>