Can i extend my wireless connections?

Question

I have a compaq presario V6101US laptop and I have been fortunate to pick up my neighbors connection but I recently moved and I only get one connection that I can get on to, but some days I can get on and some days I cannot. The other connections are secured and asks for a code. Someone said that I have to buy a wireless card where i will be able to get access anywhere but they said theres monthly fees and that they are expensive. I went to Best Buy and some chick told me that I can buy a router but they also have monthly fees?Im trying to avoid spending money right now so is there something else I can do to expand my wireless connections? If theres a way please let me know the cheapest way to help me because I start college in 5 days. Broke single mom needs your assistance, thank you [e-mail]