Hi Welcome to AT!
To answer your first question: Select the post you want to quote, then select the quote button next to reply on the the bottom of the post, and then copy paste what comes up in the pop up box into whatever reply you want to.
To answer your second question: No, you do not need any commands. Click on New Topic, then Add Poll on the bottom of the pop up box. Enter your question in the text field and hit add question. Then you will see your question appear at the bottom of the text box, next to that will be a button with an X on it labeled answers, click that, then enter your answer and press enter or click the add answer button. Then go back to other pop up box with your original post and hit post. Your poll will be included and you can then exit out of the poll pop up box. To add more than one question to your poll just bit the back button after adding answers to your poll.
Hope that helps.
