I get the prompt on loading screens telling me that when in the character grid I can buy characters. I know to pull open the character grid you have to be in freeplay, but all my characters are blacked out and I don't see an option to buy them.
For that matter, I have no clue how to buy vehicles or how to purchase extras.
Go to any S.H.I.E.L.D. terminal in New York (they have a blue icon on the map) and activate it. You can then purchase vehicles or characters, or go straight to the Helicarrier. --- "Man how to people figure this stuff out? A rubber band on the R button." - HYPERMECHA
I don't remember if the game explicitly tells you about that or not.
Also, Extras (a.k.a. red bricks) are purchase from a computer in Deadpool's room on the S.H.I.E.L.D. Helicarrier. --- "Man how to people figure this stuff out? A rubber band on the R button." - HYPERMECHA