(a) The proceeds of the bonds and any property purchased with the proceeds of the bonds;
(b) Any security pledged, mortgaged or otherwise made available by a developer for the securing of bonds or other indebtedness; and
(c) No municipality shall have the power to obligate itself except with respect to the application of the revenues from the tax increments; nor shall any municipality have the power to incur a pecuniary liability or charge upon its general credit or against its taxing powers.