Thom's seminal cobordism paper in English?

An English translation of this paper is included in the first volume of the "Topological Library", edited by Novikov and Taimanov. See the following website : http://www.worldscibooks.com/mathematics/6379.html

By the way, Thom's paper is rather hard to read. There are alternative expositions (often with somewhat easier proofs) of various pieces of it in various places. What portion in particular is giving you trouble?

An English translation is also available online here:

http://math.mit.edu/~hrm/kansem/thom-some-global-properties.pdf