You have to take the GRE first. The chances of you going for free are pretty slim, most graduate programs do not provide financial aid. You can however get low interest student loans and perhaps a work study.
In science, it's paid for by either TA'ing or assistant research (rare). GRE is a must in the sciences, and the MAT can be substituted for arts-type grad programs. I strongly going to a Half Price Books or used book store and buying a book about grad school. It will tell you everything you need to know.
Perhaps Nathan could give some input here, but if I remember correctly, you're not majoring in science, so I'd say check out USNWR or the XOXOHTH grad boards in addition to getting a cheap paperback book covering the ins and outs of grad school admissions and such.
I took the GMAT. . .scored in the 98th percentile on the verbal part and (I can't fucking believe I'm admitting this) 28th percentile on the math part. . .there's some compelling anecdotal evidence that I may be missing one half of my brain. . .FYI. . .finished grad school with a 3.98. . .got one friggin A-
I didn't have to take the GMAT to get into the school I went to. I think they require it now though. But it depends on the type of program you want - mine was non traditional
Scools that do not require the GMAT, GRE etc. are generally not accredited by the big agencies. For example, a business PhD from a school that doesn't require the GMAT means the school is not AACSB certified - which means for teaching purposes the degree is not worth shit.
If you plan on taking the GMAT, GRE, LSAT etc. spend three months to take it.
Scools that do not require the GMAT, GRE etc. are generally not accredited by the big agencies. For example, a business PhD from a school that doesn't require the GMAT means the school is not AACSB certified - which means for teaching purposes the degree is not worth shit.
If you plan on taking the GMAT, GRE, LSAT etc. spend three months to take it.