If I were to purchase BTC today and transfer to a regular wallet, would it be effected? What about if transfered to electrum?
Will this effect tumbling services?
Lastly, after august first can I expect my BTC purchases to return to normal provided they are not effected in question one.
I know there have been a lot of questions but I just want clean answers.
No, but be sure as hell that you buy before the fork and that you store them in a wallet who's private keys (to the addresses) you know. Electrum is an example of this.
Probably not except that the blockchain generally will be unstable for a couple of days so you shouldn't do any transactions at all (or your BTC could disappear into thin air).
People are saying "a day or two" until the blockchain settles out enough for transactions to be reliable. I don't know exactly how long that is (or honestly, why people are predicting instability but they all do). More broadly the price of BTC will probably be damaged somewhat and more volatile, which is a PITA.
EDIT: Here is a timeline which may help gauge how long all this will take: https://www.coindesk.com/bitcoin-cash-what-expect-fork-10000-foot-view/