Look I´ve had tried several of them, and yes some times is difficult to pay for one when you are brand new on all of this internet marketing thing.
Look I have written several ebooks that you can download for free, you can find them at me website here:
I do specially recommend you to read the following ebooks:
List building ninja
The 5 killing mistakes you make with your sales funnels
Fast traffic Ninja
Email profit magician
Now on regards you answer these are my recommendations:
Free PHP Script, I use this script from leadsleap and write down a free and illustrated guide to know how to installe it - Of course I can help with this if you want (Free, no fees ever, runs on your own server)
Aweber - $1 for first month then $19/month
Get response - 1rst month free - Then $14/month
Rapid Response $25 for first 6 months
Looks please contact me if you need assistance on any of them, really.
Please tell me what niche is your business on, what topic would you like to talk about to your subscribers?
the answers will help you get your follow up sequence organized.
Well I hope this could help.