I'm about to rent an apartment, it requires a 1 year lease. I already put down the $600. Deposit, my question is I want to move in today 4/23/07 how much will I have to pay being it is almost the end of the month?

How is the rent going to run ? From 1st of month or from the date you move in, next they may require the rest of this month and next months, the people you need to ask this is the rental company you are going to rent from as to their business policy

There is no general rule on this. Its subject to negotiation between you and the landlord.