L.S.
When my oldest daughter let us know she was ready to potty train when she would bring us a diaper and wipes to changer her. She got treats (m&ms, jelly beans) for using the potty chair. Sometimes she would use the big potty, but she was not consistent until we spent a weekend with friends and she saw her friend use the big potty. That was all it took for her to use the big potty all the time. She also really liked the potty seats that you put on the seat to make it kid size, then she wasn't afraid that she would fall in. She would put in on herself when she needed to potty.
Good luck, we have been working with daughter # 2 and she is slowly getting the hang of it. I found that she did worse on the days where she wore diapers or pullups with underware. So for now she is in pullups and when she can go several days in a row with out pottying in a pullup she gets to wear underware.