Can I receive payments from all available methods if I only connect one (e.g. only my bank account)?

Yes - for sales made on the Marketplace, you can choose your preferred payment method from the available options (bank transfer, wire transfer, PayPal or check). For example, if the customer uses PayPal and you don't have a PayPal account, you can still get paid direct your bank account, provided you've completed your setup and chosen your payout method here.

This doesn't apply to your personal stores, and you will need PayPal or Stripe to receive corresponding payments. You can see the difference between personal and marketplace store payments here.