Supplementing ?

Okay I really want to at least try breast feeding. I want to at least give my baby the colostrum .  But I do not want to have her attached to my boob . I want to pump it . Just because I know when I need to go back to work it isn't very likely I'll be able to continue doing it and I don't want her attached to my nipple and not take a bottle . But I do know I at least want to give her the colostrum no matter what . My question is how does supplementing work ? I'm going to have wic . Also where can I get a good cheap pump ? I know wic gives you one to use but I heard they really suck .