Finance will be the healthy food for a new start up company, if we face financial problem in the beginning of the company we cannot survive in the market. For any new company a good finance is foremost important then other tools.
as a start-up and entrepreneur i think Finance is the basic thing ,without it you cant sustain .
Human Resource & Information Technology is your core competency , if you are doing it wrong you will have a big failure.
once you have every thing done properly ,definitely you will need the marketing. i would rather to say its a matter of balance-loading thing , each stage has its own requirements, and all of them are equally important.