Small program to download wikipedia articles to pdf
Here are some stylistic and code style points:


fix the variable naming - in Python, there is a lower_case_with_underscores variable naming style (PEP8 reference)
organize your imports as per PEP8 guidelines - first, the system-level imports, then third-parties, then your "local" imports. Also, remove unused from gtts import gTTS import:

import os

import pdfkit
import wikipedia

docstrings should start with a capital letter and end with a dot
I think you should define pdfOptions as a module-level (or configuration-layer-level) constant instead of having them defined as an instance variable
if self.includeLinks == False: can be simplified to if not self.includeLinks:
you should have spaces around the operators inside expressions (reference)
I think you can handle both cases in your download() method in a unified way:

def download(self):
    links = self.page.links if self.includeLinks else [self.page]
    for link in links:
        page = wikipedia.page(link)
        print("Downloading " + page.url)
        filename = self.targetDir + "/" + page.title + '.pdf'
        pdfkit.from_url(page.url, filename, options=self.pdfOptions)

I would also use os.path.join() instead of string-concatenating filename paths