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Multiple questions here. Seems you're somewhat new in networking?
First off network interface statistics, these have to do with layer 1 being the physical connection. Bad cabling and connectors can cause these kind of problems. Unmatched interfaces as well.
Then the packet checksums, these have to do with layer 4 being the transport layer. Outgoing packets get captured before they arrive at the network card, of which the better ones are known to take on the task of checksum calculation. So when packets arrive at the capture interface these have not been calculated, hence most likely incorrect.
Then the ICMP reported errors. These packets have the first 28 bytes of the initiating packet as payload, which has more often than not an incomplete transport layer. The transport layer dissector doesn't like that and throws out an error indication.
