I would like 點解,點用

i would like is the same as"i will like" excepet that it is past tense.

EX:I would like to have a waslk with you

Could you like is the same as Can you like(but it doesn't make sense)

people less likely to say this way.If you ask people if they like something,you don't say "could",you use "would" instead.

EX:Could you bring me my sweater?

I would like 我喜歡
I would like to have a word with you.
我想同你說句話。
could you like (用於婉轉語氣)能,可以
Couldn't you try it again?
你可否再試一下?