I would like to know how would one go about and answer this question. I know that a language is decidable if a turing machine exists that accepts the strings in that language, and rejects otherwise. Would I need to create a turing machine to show this or is it enough to create a PDA and claim a TM can be created from a PDA such that it accepts and halts all strings in it and rejects otherwise. Also, if anyone can refer a good post to learn how to create a PDA from CFL would be greatly appreciated. Thanks!
If a language decidable by a PDA then it is also decidable by a TM. In other words TM are more computationally powerful than PDA, i.e., the class of languages decidable by PDA is a proper subclass of the class of languages decidable by TM. You can also easily simulate a PDA on a TM.
However not all languages are decidable by PDA. So your approach does not work in general.
As to CFG to PDA conversion I would recommend the textbook by Sipser (pg 116). Google search for "CFG to PDA" also gives a good result.