You shouldn't need any extra toolkits to simulate an RLC circuit - the solution is a fairly simple damped sinusoid. Look in the Mathematics palette for all the functions you need.
Sounds like a homework assignment to me...
No, there is no R and C element in the Mathematics palette. That's because LabVIEW is a programming language, not a circuit simulator.
In fact, I'm guessing you're in the same class as this fellow: http://forums.ni.com/t5/LabVIEW/regarding-electronics/td-p/1709686
Step 1: Write out your mathematical model
Step 2: Implement the mathematical model in code
Make an effort first. If you have specific questions, then post them. We won't do your homework for you.