How to start a gaming channel on youtube with a Pentium 4 PC?

Hey guys 'sup you all, I have recently got the idea for starting a gaming channel or (if my PC is not good enough) just a simple gaming channel. My rig is:-
Pentium 4 3.0 GHz
HD 5450 2GB DDR3
2GB DDR2 RAM
Windows 7 Ultimate
I have lots of doubts before I start my channel because I want it to be successful. And my doubts are:-
1. Is my rig good enough to run a low end gaming channel?
2. Please suggest me some popular but low end titles which my rig can run such as Minecraft but don't suggest strategy games such as league of legends, atlantica etc. Because I'm terrible at it.
3. Please list all the things like softwares except a capture card(because I'll use bandicam for it).
4. Is a capture card necessary for recording low end games, I mean bandicam or fraps can do it too.
5. Suggest me some old and famous till now titles like NFS(till 2006), Call of Duty and GTA on which I can make walkthroughs.
6. Please help me with all the small things that I should do and tips to make my gaming channel quite successful and tell me the procedure of how gamers earn their money online on youtube like theradbrad, pewdiepie etc.

NOTE:- Don't suggest me some costly or any heavy upgrades for my system as I initially can't afford them at all, but, I can do that later when my channel is grown quite good.

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