1995 Chevy Blazer

I was driving on the freeway and all of a sudden my check guage light came on and it looked like the car was starting to over heat, slowly the truck started to shut off. When I got out there was a big puddle of oil all over the ground. I tried to restart the truck and it wanted to start but did not and I think it was due to the oil. 2 weeks prior to that I got my oil changed and transmission flushed. Well I havent had a chance to have someone look at it but while it was sitting in the drive way there was a like clay colored liquid on the ground also when I got my oil changed the guy said it was time for a radiator flush but I didnt have the money to get it what do you think is wrong do you think that is what has caused the car to stop working what is a solution?