I believe the first figures that I got were the four turtles on Easter 1990, followed by getting Splinter, April, Shredder, and Krang (in the bubble walker). I remember taking the figures out of the package with my sister and giving them their weapons/accessories.
I got the Party Wagon and the Leonardo Role Play Gear for my birthday in September of that same year, and also got Bebop and Rocksteady for Christmas (I think I got Casey Jones sometime around this year too...).
Awesome memories.