Some of your quesions offer the same answers as options, such as question 1.
2 yes use caps
3 use etc not Etc
4 3 full stops after a sentence are not good, only used in very informal writing such as here
5 Use double quotes here "Jurassic Park". Singles are apostrophes as in Park's.
6 (these) are used in English and [these] more likely to be used in science or computer language