C150 private, C172 instrument, Trinidad TB-20 (French-built high-performance single) commercial, Seminole multi.

Getting your private at a part 61 op in a C150 will often be VASTLY cheaper, as long as you are diligent to search out the quality of their training beforehand. Pay particular attention to the rigor of their groundschool (or lack thereof). If you find a good part 61 op, I would recommend going that route for private and then transferring to a part 141 university op that can get you a restricted ATP. Above only applies if you are considering an airline career, of course, as the experience mins for an ATP are very different depending on your education.