Spaceballs scene is "Comb the desert" : 

The actor who played the 'we ain't found shit' guy is Tim Russ, the same actor who played Tuvok on Star Trek Voyager:

http://en.memory-alpha.org/wiki/Tim_Russ

Imgur comments: http://imgur.com/gallery/DcHPW

Reddit comments:

http://reddit.com/r/videos/comments/2no6hq/star_wars_vii_the_force_awakens_teaser_trailer/cmfbze8?context=3

Found here:

http://pandawhale.com/post/35805/spaceballs-we-aint-found-shit-gif

"We ain't found Sith."

As a gif:

Thank you orbitalsideburns2014 for this gif:

http://reddit.com/r/HighQualityGifs/comments/2no868/mrw_i_cant_play_the_new_star_wars_teaser/

Perhaps he's Jango Fett's brother, Django Fett:

The D is silent:

Imgur comments: http://imgur.com/gallery/XL3dgg0

Reddit comments: 

http://reddit.com/r/funny/comments/2o6cxk/star_wars_fans_can_stop_freaking_out_now_ive/

Millennium Falcon:

http://pandawhale.com/post/54399/star-wars-force-awakens-millennium-falcon-gif

Thank you hallucinoJER for this gif:

http://reddit.com/r/HighQualityGifs/comments/2nt5ok/combing_the_desert/

plowkiller's Spaceballs I'm surrounded by assholes gif: http://gfycat.com/HardShyKiskadee

Found here: http://reddit.com/r/HighQualityGifs/comments/2nt5ok/combing_the_desert/

Spaceballs III: The Search for Spaceballs II

Star Wars / Spaceball Combing the Desert combined gif:

http://pandawhale.com/post/54425/star-wars-force-awakens-spaceballs-combing-the-desert-gif