Hi I have a 02pontiac aztek his changed thermostat VCR had antifreeze in overfl

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Ow an we thought may been thermostat too apartchanged it bygone in it opened up but not skew may been stickin .an he had battery unplugged all night we got all back together an now worse wouldn't hardly turn over making a rough lik not getting power somewhere as well Acted a if gonna. Die missing out then I shut off. waited. .an tried again an was worse but started right up an didn't hit gas anything just started an the rpms jumped.to 2/3 grand an never not started an acted lik this also my oil engine low on an its full prob Senor or fuze but my electric fan has never kicked on either but last few weeks noticedhad water or some liquid all over both. Driver & passenger floor board doesn't seem lik aseal but not sure.. ??? Has 150k on motor any ideas??? Need fixed asap only vehicle an single parent ....dot know much bout Pontiacs.. any help on advice be greatly appreciated! Thanks