How much does it cost to get a green card? Also, do you have to pay to enlist in the US army?

Hello Nathen, firstly to begin application process prices vary depending on type of greencard I.e. work, family member etc. Your best bet is to visit the formal USCIS site and read up on the process and cost.

http://www.uscis.gov/greencard

For the army, no there is no fee to enlist in the army. They will go through a selection process with you, some tests and inform you at what level you may enter I.e. soldier, officer etc.