Currently the True Finns will be holding 39 seats in the 200 member parliament. The conservative National Coalition Party has 43, and the Centre Party of Finland has 35. A coalition of the three parties would produce a center-right majority coalition with 117 seats. There is no way to have a center-right coalition which excludes the True Finns.
The Centre Party could do a center-LEFT coalition with the various leftist parties. Somebody who actually knows something about Finnish politics, like I assume Viiksitimali does, could weigh in on the probability of that.