Justin,
Billy's right, those Briggs & Stratton engines struggle to run if the air filter is choked. I think you have probably put a little too much oil in, I did it on my last TM, and it only takes a little too much and it gets drawn into the air filter and you get the problems you have described. You will have to drain a little oil and get a new air filter. What I did, was draw a bit of oiil off, ran it for a couple of hours without an air filter to clear the carb. New air filter then no further problems.
Dave.