我今年这个岁数了 means I'm at the age of.... and for the second question, do you want to ask what is 可要，可不要 means ? In China , people don't speak like this , they usually speak: 要，还是不要

" 可要，可不要" means it doesn't matter wether I get it or not, i don't care. in Chinece,“可。。。，可。。。”means you have 2 choices and either is ok for you, no big difference betweent the two choices, or means you can freely choose between the two. Take following sentance for example: A:你现在想吃东西吗？do you want something to eat now? B：我现在还不是很饿，可吃，可不吃。i am not too hungry ,and i am ok to eat or not now~

Okay , I konw what you mean. 可要可不要，Do not use the dot to separate the sentences into two parts. and it means something is not very important for yourself.It doesn't matter whether you got it or not

可要，可不要 ， it maybe means, for the things u want, u can have it, but if u don't have it finally, u will feel okay, it doesn't matter.