I had a no name pocket rocket a few years ago, fun as hell! My dad threw it out tho

after the pull start broke and refused to retract. Ever since i have gotten really good at custom building computers and figured i wanted to get back into mini bikes! I bought a Cobra S4 from minipocketrockets.com (yeah, i kno) and i cant wait until it gets here on monday! A few quick questions:
1) I kno NOTHING about engines, idk what a carb is, or what a spark plug does, but i am aiming to learn and start modding quads and bikes soon

any info and stuff u can give me would help
2) I have heard about the "death wobble" issue on these bikes and have read several of the articles on how to fix it. The problem is, idk what a "toe in" or anything like that is, so if you could give me a dummy's guide to fixing it, i would much appreciate it!
3)As far as mixing fuel, i wont have time to jet out to Autozone to get a ratio cup that day, but its on my to do list. Can someone plz exlplain how to mix it 1:25 with the cup it comes with?
4) I have heard about the clutch issues, but i will be ignorant and ride it till it brakes and then but in an aftermarket one. The only problem is, idk where it is on the bike so and advice would help!
TY IN ADVANCE!